JPH08298689A - Communication processor and progammable controller provided with the processor - Google Patents

Abstract

PURPOSE: To make it possible to select and utilize plural communication systems without expanding the scale of a connector. CONSTITUTION: A common connector 11 has common pins 111, 112 to be connected so as to be overlapped to the pins of respective peripheral side connectors having different communication systems and a connection switching part 13 has change-over switches 131, 132 corresponding to the common pins 111, 112 and a state setting switch 133 for setting up the operation states of respective communication interface parts. The switches 131, 132 interlocked with the switch 133, switch the connection of the connector 11 to respective communication interface parts and send an enable signal to the operation setting ports ENA to END of the connected communication interface parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication processing device to which a plurality of peripheral devices having different communication systems are connected and which communicates with each peripheral device, and a programmable controller having the communication processing device.

[0002]

2. Description of the Related Art Generally, a programmable controller, a computer device, etc. have a built-in communication processing device,
Data communication is performed with peripheral devices via this communication processing device.

In such a communication processing device, a plurality of communication interface units corresponding to the respective communication systems are mounted in advance in the device so as to be able to communicate with the peripheral devices of different communication systems, and the peripheral device to be connected. A connector is provided for each communication method, that is, for each communication interface unit.

[0004]

By the way, in such a communication processing device, in addition to the request for communication with peripheral devices of different communication systems, there is always a demand for downsizing of the device itself.

However, in the conventional communication processing device, since the connector is provided for each communication system of the peripheral device so that the communication device can communicate with the peripheral device of the different communication system as described above, the connector scale becomes large and the device is miniaturized. There was a problem that I could not.

The present invention has been made in view of such a problem, and provides a communication processing device which can be used by selecting a plurality of communication systems without increasing the connector scale, and a programmable controller having the communication processing device. The purpose is to

[0007]

In order to achieve the above object, in the invention according to claim 1, a plurality of peripheral devices having different communication systems are connected to each other and a communication processing device for communicating with each peripheral device is provided. When the peripheral side connector of the peripheral device is connected, a common connector having a common pin that is connected to each pin of the peripheral side connector having a different communication method and a communication method of the peripheral device are respectively supported. And a common pin of the common connector, which is provided between the common connector and the plurality of communication processing means, and which is provided between the common connector and the plurality of communication processing means. Connection switching means for switching the connection between the plurality of communication processing means.

According to the second aspect of the invention, the first aspect is
In the described communication processing device, the number of pins of the common connector is the same as the maximum number of pins of the peripheral side connectors of each peripheral device.

In the invention according to claim 3, the invention according to claim 1
Alternatively, in the communication processing device according to claim 2, the connection switching means is provided corresponding to the common pin of the common connector, and the connection between the common pin of the common connector and each communication processing means has the same polarity. The communication processing means connected to the common connector by the plurality of changeover switches is connected to the plurality of changeover switches and the plurality of communication processing means, and is linked with the plurality of changeover switches with the same polarity. Set to enable state,
And a state setting switch for setting a communication processing unit other than the communication processing unit to a disabled state.

In the invention according to claim 4, the invention according to claim 3
In the communication processing device described above, a notifying means for notifying the communication processing means set to the enabled state by the status setting switch is connected on the status setting line between the status setting switch and each communication processing means. It is characterized by

According to the invention of claim 5, claim 1
Alternatively, in the communication processing device according to claim 2, the connection switching means is provided corresponding to the common pin of the common connector, and a plurality of changeover switches for switching the connection between the common pin and each communication processing means are switched. A plurality of interlocking switch groups divided for each interlocking operation, a plurality of state setting switches provided for each of the plurality of interlocking switch groups, and switching the polarity in cooperation with each interlocking switch group, Communication state setting means for setting each of the communication processing means to the disabled state when the switching polarities of the state setting switches do not match.

The invention according to claim 6 is characterized in that it is a programmable controller having the communication processing device according to claim 1, claim 2, claim 3, claim 4 or claim 5.

[0013]

According to the present invention, when the peripheral side connector of the peripheral device is connected to the common connector, the common pin of the common connector is connected to the respective pins of the peripheral side connectors of different communication systems in an overlapping manner. Then, a connection switching means provided between the common connector and each communication processing means is provided between the common pin of the common connector and each communication processing means according to the communication system of the peripheral device connected to the common connector. Switch connection.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a communication processing device according to the present invention and a programmable controller having the same will be described below with reference to the drawings.

FIG. 1 shows a first communication processing device according to the present invention.
1 shows a schematic configuration of an example.

This communication processing device is provided in a communication processing unit of a programmable controller, and as shown in the figure, one common connector 11 and a plurality of peripheral devices connected to this device (first embodiment). In this case, there are four communication interfaces 12a to 12d corresponding to different communication systems, a connection switching unit 13 for switching the connection between the common connector 11 and the communication interfaces 12a to 12d, and a communication interface unit. 12a-1
2d and the communication controller 14 which performs communication control processing.

The communication interface units 12a-12d are
Each of them is composed of a line driver / receiver for RS-232C or RS-422 interface having a different communication system specification, and each of them is a state setting port EN.
By inputting a negative logic state control signal to A to END, the state is set to the enable / disable state, and the output is normally performed or is set to high impedance.

Then, each communication interface section 12a-
12d and the connection switching unit 13 are connected to each other via communication signal line groups 15a to 15d including input and output data lines of each communication system specification, control lines, and the like, and each communication interface unit. The state setting ports ENA to END of 12a to 12d and the connection switching unit 13 are connected via state setting lines 16a to 16d.

Further, each communication interface section 12a-1
2d and the communication controller 14 are connected via a communication signal line 18 which is unrelated to each communication system specification.

FIG. 2 shows in detail the construction of the common connector 11 and the connection switching section 13 of the first embodiment shown in FIG.

The common connector 11 is shown in FIG.
When the peripheral side connectors (not shown) of the peripheral devices having different communication systems are connected, the common pins 111 and 11 which are overlapped with the pins of the peripheral side connectors having different communication systems.
It has two 2.

Although not shown in this figure, the common connector 11 is not overlapped with the pins of the peripheral side connectors having different communication systems, and the connection switching unit 1
It has a normal pin that is directly connected to the corresponding communication interface section without going through 3.

The number of connection switching units 13 is the same as the number of common pins 111 and 112 of the common connector 11,
Changeover switches 131, 1 provided corresponding to 112
32, one state setting switch 133 for setting the operation state of each communication interface unit 12a to 12d, the state setting switch 133, and each communication interface unit 12a.
.. to 12d, and pull-up resistors 17a to 17d provided on the status setting lines 16a to 16d. The plurality of changeover switches 131 and 132 and the status setting switch 133 are configured to operate in conjunction with each other. ing.

Since the number of changeover switches 131, 132 corresponds to the number of common pins 111, 112 of the common connector 11, when the number of common pins is more than two, it increases accordingly.

The changeover switches 131 and 132 are respectively I / F unit side pins 131a to d and 132a to 132d connected to the respective communication interface units 12a to 12d through dedicated communication signal line groups 15a to 15d. , Common connector 1
It has connector side pins 131e and 132e connected to one common pin 111 and 112, and the connector side pins 131e and 132e and the I / F section side pin 131a are interlocked.
-D and 132a-d are configured to be switched with the same polarity.

Further, the state setting switch 133 is a state setting port EN of each communication interface section 12a-12d.
A to END and I / F unit side pins 133a to 133d connected via the state setting lines 16a to 16d, and a grounded G
ND pin 133e, and changeover switch 13
GND pin 133e in conjunction with the switching operation of 1,132
By switching the connection between the I / F unit side pins 133a-d and the I / F unit side pins 133a-d, an enable / disable setting signal which is a state setting signal is sent to the state setting ports ENA-END of the respective communication interface units 12a-12d. Is configured.

That is, for example, as shown in FIG.
When the F section side pin 133a is connected to the GND pin 133e, a negative logic "LOW" is output to the setting port ENA of the communication interface section 12a, and this communication method 12a is set to the enabled state. While I
The / F section side pins 133b to 133d are the GND pins 13 respectively.
Since it is not connected to 3e, each pull-up resistor 1
7b to 17d for each communication interface unit 12
"HIGH" is output in negative logic to the setting ports ENB to END of b to 12d, and the other communication methods 12b to 1
2d is set to a disabled state, and its output line is set to a high impedance state.

Next, the operation of the first embodiment thus constructed will be described with reference to the drawings.

First, in the communication processing device thus configured, the common connector 1 is connected to the communication interface unit 1
Assuming that a common connector (not shown) of a peripheral device of, for example, RS-422 specifications, which is the communication system specification of 2b, is connected, the connection switching unit 13 connects the common connector 1 as shown in FIG. From the connection state with the communication interface section 12a of the 232C specification, the common connector 1 and the R
It switches to the connection state with the communication interface unit 12b of S-422 specifications.

That is, in the connection switching unit 13, the connector side pins 131e and 13 of the changeover switches 131 and 132 are connected.
2e and the GND pin 13 of the status setting switch 133
3e are connected to I / F section side pins 131a, 13 respectively.
2a, 133a to I / F section side pins 131b, 132
b, 133b.

Then, the communication interface section 12b
Connector side pin 131 of changeover switch 131, 132
common pin 1 of the common connector 11 via e, 132e, I / F section side pins 131b, 132b, and communication signal line 15b
11 and 112, and a negative logic "LOW" enable control signal is input from the state setting switch 133 to the state setting port ENB of the communication interface unit 12b to set the state to the enable state. The signal input via the common pins 111 and 112 of the communication controller 1 is converted according to the communication system, and the communication controller 1
Can be sent to 4.

Therefore, according to the first embodiment, the peripheral side connectors of a plurality of peripheral devices having different communication systems are mounted on the common connector 11, and the common pins 111 and 112 in the common connector 11 are arranged in a plurality. Since it is commonly used for connecting the peripheral side connector of the interface, it is possible to support peripheral devices for different communication methods without increasing the connector scale, and the overall size of this device can be reduced and the cost is low. Becomes possible.

Further, since the plurality of changeover switches 131 and 132 in the connection changeover unit 13 are interlocked with each other, the changeover switches 131 and 132 are always changed over with the same polarity, so that erroneous operation of the changeover switches 131 and 132 is eliminated and a plurality of changeover switches 131 and 132 are eliminated. Since the changeover switches 131 and 132 and the state setting switch 133 are also interlocked with each other, erroneous operation of the changeover switches 131 and 132 and the state setting switch 133 can be eliminated, and only the selected communication interface section can be enabled, and data collision can occur. It is possible to avoid the above, and to prevent erroneous data from flowing into the internal circuit.

Next, a second embodiment of the communication processing apparatus according to the present invention will be described.

The communication processing apparatus according to the second embodiment is basically the same in configuration as the communication processing apparatus according to the first embodiment shown in FIGS. 1 and 2, and is the same as the communication processing apparatus according to the first embodiment. ,
Further, it is characterized in that the communication interface section selected by the connection switching section is notified by lighting a light emitting diode (hereinafter referred to as "LED").

FIG. 3 shows the configuration of the connection switching unit 13 ', which is the main part of the second embodiment.

As shown in the figure, the communication processing device of the second embodiment has a state setting switch 13 of a connection switching unit 13 '.
3 and status setting port ENA of each communication interface
An LED is connected to each of the state setting lines 16a to 16d connecting to END. Note that in FIG. 3, for convenience, only the LEDs 20a on the state setting line 16a are shown.

Therefore, according to this second embodiment, as shown in FIG.
As shown in, the status setting switch 133 has the GND pin 1
When 33e is connected to the I / F unit side pin 133a, the status setting port E of the communication interface unit 12a
Since the NA is grounded to GND through the state setting line 16a and becomes "LOW", the power supply voltage of the LED 20a is + 5V.
Current flows from the LED to the GND via the LED 20a,
20a is turned on.

Therefore, according to the second embodiment, the common pin 11 of the connector 11 depends on which connection switching section 13 '.
To which communication interface unit 1, 112 is connected can be known by turning on each LED on the state setting lines 16a to 16d, so that the switching result of the communication interface unit can be visually confirmed, and the connection can be improved. The switching work of the switching unit 13a 'will not be mistaken.

Therefore, in particular, when the connection switching unit 13 'is mounted at a location where it cannot be visually confirmed, the communication interface unit currently in use is visually confirmed by lighting each LED on the status setting lines 16a to 16d. You can and will be effective in such cases.

Next, a third embodiment of the communication processing apparatus according to the present invention will be described.

The communication processing device according to the third embodiment differs from the first and second embodiments in that all the changeover switches of the connection changeover unit are interlocked with each other. In consideration of the number of change-over switches built into one change-over connection portion, a plurality of interlocking switch groups are provided for each interlocking change-over switch.

FIG. 4 shows a schematic configuration of the communication processing device of the third embodiment.

The communication processing device of the third embodiment is constructed as shown in FIG. 4, and includes a common connector 11 and an RS.
/ 232C and RS-422 specification line driver / receiver two communication interface units 22
a, 22b and each communication interface unit 22a, 22b
And a plurality of units (here, two units) interlocked with the communication signal lines 25a and 25b dedicated to each communication system to switch the connection between the common connector 11 and both communication interface units 22a and 22b. It has a connection switching unit 23 including a switch group and a communication controller 14.

Further, the communication interface units 22a, 22
b have state setting ports ENA and ENB, respectively, and state setting ports ENA and ENB and connection switching unit 23.
Are connected by the status setting lines 26 and 26b, respectively, and the LEDs are provided on the status setting lines 26 and 26b.
30a and 30b are connected.

FIG. 5 shows in detail the configuration of the common connector 11 and the connection switching section 23 of the third embodiment shown in FIG.

In FIG. 5, the common connector 11 has four common pins 111 to 114, which are not shown, but are not overlapped with the pins of the peripheral side connectors of different communication systems. It also has a normal pin that is directly connected to the corresponding communication interface unit without going through the connection switching unit 23.

The connection switching unit 23 has two interlocking switch groups 23a, 23 divided for each interlocking switch.
b, OR circuits 23c and 23d, and pull-up resistor 23
e to 23h. In this figure, the OR circuit 23c and the pull-up resistors 23e and 23f function as the communication state setting means of the communication interface section 22a.
The OR circuit 23d and the pull-up resistors 23g, 23h and the like function as the communication state setting means of the communication interface unit 22b.

The interlocking switch groups 23a and 23b are provided with the changeover switches 231a, 232a and 2 provided corresponding to the common pins 111 to 114 of the common connector 11, respectively.
31b and 232b and the communication interface units 22a and
A state setting switch for setting the operating state of 22b and 233
a, 233b.

In the interlocking switch group 23a, the changeover switches 231a and 232a and the state setting switch 23 are arranged.
3a are interlocked, and in the interlocking switch group 23b, the changeover switches 231b and 232b and the state setting switch 233b.
And are configured to work together.

The changeover switches 231a, 232
The connection between the a, 231b and 232b and the common pins 111 to 114 and the connection with the communication interface units 22a and 22b are the same as those in the first and second embodiments.

Further, each state setting switch 233a, 23
3b is a GND grounded on the connector side.
The pins 233a1 and 233b1 are provided, and the communication interface units 22a and 2 are provided on the interface unit side.
I / O connected to the status setting ports ENA and ENB of 2b
F part side pins 233a2, 233a3, 233b2, 23
It has 3b3.

The input side of the OR circuit 23c is connected to the I / F section side pins 233a2, 233b2 of the state setting switches 233a, 233b through the signal line to which the pull-up resistors 23e, 23g are connected. On the output side, the status setting port EN of the communication interface unit 22a is connected via the status setting line 26a to which the LED 30a is connected.
It is connected to A.

Similarly, on the input side of the OR circuit 23d, I of the state setting switches 233a and 233b is connected via a signal line to which the pull-up resistors 23f and 23h are connected.
While being connected to the / F section side pins 233a3, 233b3, its output side is connected to the status setting port ENB of the communication interface section 22b via the status setting line 26b to which the LED 30b is connected.

Next, the operation of the communication processing apparatus according to the third embodiment configured as described above will be described mainly with reference to FIG.

First, the state setting switches 233a and 233b of the interlocking switch groups 23a and 23b respectively set the connection destinations of the GND pins 233a1 and 233b1 to the I / F unit side pins 233a2 and 233b2 as shown in FIG. The case will be described first.

In this case, the I / F section side pins 233a2, 2
Since 33b2 is connected to GND, "LOW" signals are input to the two inputs of the OR circuit 23c, and OR
While the "LOW" signal is output from the output side of the circuit 23c, the I / F section side pins 233a3, 233b3 are not connected to GND, so the two inputs of the OR circuit 23d are pulled up on the signal lines 23j, 23m. Resistors 23f, 23h
Thus, the "HIGH" signal is input together, and the "HIGH" signal is output from the output side of the OR circuit 23d.

Therefore, the state setting port ENA of the communication interface section 22a has a negative logic "L" via the state setting line 26a connected to the output side of the OR circuit 23c.
OW "signal is input and LE on the status setting line 26a
While the D30a lights up, the communication interface section 22b
The negative logic "HIGH" signal is input to the state setting port ENB via the state setting line 26b connected to the output side of the OR circuit 23d, and the LED 30b on the state setting line 26b is turned off. .

Therefore, in this case, the LED 30a is turned on to indicate that the switching polarities of the interlocking switch groups 23a and 23b are the same, and the LED 3
0a is turned on and the LED 30b is turned off so that the connection by the interlocking switch groups 23a and 23b is switched to the communication interface section 22a side, that is, the communication interface section 22a is set to the enabled state and the communication interface section 22b is set. Is set to the disabled state.

The state setting switches 233a, 233
In the case where b is the connection destination of the GND pins 233a1 and 233b1 to the I / F section side pins 233a3 and 233b3, respectively, the switching polarities of the state setting switches 233a and 233b are the same, so the same as the above case. And then L
Interlocking switch groups 23a and 23b by lighting of the ED 30b
It shows that the switching polarities of
By turning off the light 30a and turning on the LED 30b, the communication interface unit 22a is set to the disabled state, which means that the communication interface unit 22b is set to the enabled state.

Next, the status setting switches 233a and 233.
A case where the switching polarities of b do not match, that is, the switching polarities of the interlocking switch groups 23a and 23b do not match and the switching is erroneous will be described.

First, for example, in the state setting switch 233a on the interlocking switch group 23a side, as shown in FIG.
While the D pin 233a1 is connected to the I / F section side pin 233a2, the state setting switch 233b on the interlocking switch group 23b side is different from the GND pin 2 in the case shown in FIG.
It is assumed that 33b1 is connected to the I / F section side pin 233b3.

In this case, the two inputs of the OR circuit 23c are "LOW" due to GND grounding via the signal line 23i.
A "HIGH" signal is input by the pull-up resistor 23g via the signal line 23k while the signal is input, and a "HIGH" signal is input by the pull-up resistor 23f via the signal line 23j to the input side of the OR circuit 23d. While typing
The "LOW" signal is input through the GND ground via the signal line 23m.

For this reason, since "HIGH" signals are output from both the output sides of the OR circuits 23c and 23d,
The status setting ports ENA and ENB of the communication interface units 22a and 22b are connected via the status setting lines 26a and 26b.
Negative logic "HIGH" signal is input to both
LEDs 30a, 30 on the status setting lines 26a, 26b
Both b are turned off.

Therefore, in this case, the LEDs 30a, 3
Since 0b is turned off and neither is turned on, the switching polarities of the interlocking switch groups 23a and 23b do not match, that is, the switching operation of the interlocking switch groups 23a and 23b is erroneous, and the communication interface sections 22a and 22b are both disabled. In addition to indicating that it has been set to the disabled state,
Both communication interface units 22a and 22b are set to the disabled state.

The state setting switch 233a on the side of the interlocking switch group 23a sets the connection destination of the GND pin 233a1 to I.
/ F section side pin 233a3, while interlocking switch group 2
Use the status setting switch 233b on the 3b side to connect the GND pin 233.
Even when the connection destination of b1 is the I / F section side pin 233b2, the state setting switch 233a,
Since the switching polarities of 233b do not match, as in the above case, the LEDs 30a and 30b are turned off, the switching operation of the interlocking switch groups 23a and 23b is erroneous, and the communication interface units 22a and 22b are both disabled. It means that it is set.

Therefore, according to the third embodiment, as in the first and second embodiments, the common connector 11 is used.
Since it is shared as a connector connection for each peripheral device of different communication method, the connector size does not become large, it is possible to support peripheral devices for different communication methods, and the size of the entire device can be reduced. It is possible to reduce the cost.

In the third embodiment, the interlocking switch group 23 is provided for each changeover switch that interlocks the connection switching unit 23.
Since it is configured separately as a and 23b, there is usually a physical limit to the number of interlocking changeover switches that one switch incorporates, and a few switches are common, so a common connector is more than this number. It is very effective when the number of common pins of 11 is larger.

Further, in the third embodiment, the interlocking switch groups 23a, 23b are provided for each interlocking switch group 23a, 23b.
b changeover switches 231a, 232a, 231b,
State setting switches 233a and 233 which are interlocked with 232b
b is provided, and the state setting switches 233a and 233 are provided.
If the switching polarities of b match, an enable signal is sent to the operation setting port of the newly connected one of the communication interface units, and the L of that communication interface unit is sent.
The ED is turned on, a disable signal is sent to the operation setting port of the other communication interface unit to turn off the LED of the other communication interface unit, and the switching polarity of the state setting switches 233a and 233b is changed. If they do not match, each communication interface unit 22a,
A disable signal is sent to the operation setting ports ENA and ENB of the communication interface units 22a and 22b.
Since the LEDs 30a and 30b of 2b are turned off, each interlocking switch group 23 in the connection switching unit 23
If the switching operation of a and 23b is mistaken, the communication interface units 22a and 22b will not operate in the disabled state, and it is possible to prevent data collision and erroneous data inflow to the internal circuit, and also to operate the interlocking operation. Switch group 2
LED 20a, 20 to match the switching polarity of 3a, 23b
It can be visually confirmed by turning on and off b.
Each interlocking switch group 23a in the connection switching unit 23,
There is no mistake in the switching operation of 23b.

For this reason, the third embodiment is very effective, especially in the case where the connection switching section 23 is mounted at a location where it cannot be visually confirmed, as in the case of the second embodiment.

In the third embodiment, the communication system of the peripheral device connected to the common connector of this device is RS-2.
Since there are two types, 32C and RS-422, the switching polarities of the communication interface units 22a and 22b and each of the changeover switches and the state setting switches have been described as two. However, in the present invention, the communication system is of course two or more types. Also in this case, similarly to the case of the third embodiment, an LED is provided for each communication interface section, and the switching polarity of each changeover switch or state setting switch is set to the number of types of the communication system. If configured, the third
The same effect as the embodiment can be obtained.

[0072]

As described above, according to the present invention, the peripheral side connectors of a plurality of peripheral devices having different communication systems are attached to one common connector, and the common pins in the common connector have different communication systems. Since it is commonly used for peripheral side connector connection, it is possible to support peripheral devices of different communication methods without increasing the connector scale, and it is possible to reduce the size of the entire device and reduce cost. .

Further, since the plurality of changeover switches in the connection changeover section are interlocked, the changeover switches are always switched with the same polarity, and the erroneous operation of the changeover switches is eliminated, and the plurality of changeover switches and the status setting switch are also interlocked. Therefore, erroneous operation with the changeover switch is eliminated. Therefore, only the selected communication interface unit can be set to the enable state, data collision can be avoided, and incorrect data can be prevented from flowing into the internal circuit.

Further, since the notifying means notifies the communication interface section to which the common pin of the common connector is connected by the connection switching section, it is possible to visually confirm the switching result of the communication interface section. The switching work of the switching unit will not be mistaken, and particularly when the notifying means is a light emitting diode (LED), it becomes very effective when the connection switching unit is mounted at a location where it cannot be visually confirmed.

Further, since the connection switching unit is divided into interlocking switch groups for each interlocking changeover switch, the number of interlocking changeover switches incorporated in one switch is usually physically limited and is not so large. , 3 is common, and is effective when the number of common pins of the common connector 11 is larger than this number.

Further, each interlocking switch group is provided with a state setting switch interlocking with the changeover switch of each interlocking switch group, and when the switching polarities of the state setting switches match, only the newly connected communication interface section is enabled. The communication interface is set to the disabled state and the other communication interfaces are set to the disabled state.However, if the switching polarities of the status setting switches do not match, each communication interface is set to the disabled state. When the switching operation of each interlocking switch group in the switching unit is mistaken, each communication interface unit does not operate in the disabled state, and it is possible to prevent data collision and erroneous data inflow into the internal circuit.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a first embodiment of a communication processing device according to the present invention.

FIG. 2 is a block diagram showing in detail the configuration of a connection switching unit and the like of the first embodiment.

FIG. 3 is a block diagram showing in detail the configuration of a second embodiment of the communication processing device according to the present invention.

FIG. 4 is a block diagram showing a schematic configuration of a communication processing device according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a detailed configuration of a connection switching unit and the like according to a third embodiment.

[Explanation of symbols]

11 common connector 12a to 12d communication interface unit (communication processing unit) 13 connection switching unit (connection switching unit) 14 communication controller 16a to 16d state setting line 20a LED (informing unit) 131, 132, changeover switch 133 state setting switch 23c, 23d OR circuit (communication state setting means) 23e to 23h Pull-up resistor (communication state setting means)

Claims (6)

[Claims] 1. In a communication processing device, wherein a plurality of peripheral devices having different communication systems are connected to each other to communicate with each of the peripheral devices, when the peripheral side connector of the peripheral device is connected, each of the communication systems having different communication systems is connected. A common connector having a common pin that is overlapped with each pin of the peripheral side connector, a plurality of communication processing means provided corresponding to the communication system of each peripheral device, the common connector and the plurality of communication Connection switching means provided between the processing means and switching connection between the common pin of the common connector and the plurality of communication processing means in accordance with the communication system of the peripheral device connected to the common connector. A communication processing device characterized by being. 2. The communication processing device according to claim 1, wherein the common connector has the same number of pins as the maximum number of pins of the peripheral side connectors of each peripheral device. 3. The connection switching means is provided corresponding to the common pin of the common connector, and
A plurality of changeover switches that interlock to switch the connection between the common pin of the common connector and each communication processing means with the same polarity, and are connected to the plurality of communication processing means and have the same polarity as each of the plurality of changeover switches. And a state setting switch that sets the communication processing means connected to the common connector by the plurality of changeover switches to the enable state, and sets the communication processing means other than the communication processing means to the disabled state. The communication processing device according to claim 1 or 2, further comprising: 4. A notifying means for notifying the communication processing means set to the enabled state by the status setting switch is connected to each of the status setting lines between the status setting switch and each communication processing means. The communication processing device according to claim 3, wherein 5. The connection switching means is provided corresponding to the common pin of the common connector, and
A plurality of changeover switches for switching the connection between the common pin and each communication processing means are provided for each of the plurality of interlocking switch groups divided for each interlocking switching operation, and for each of the plurality of interlocking switch groups, Communication status setting that sets the status setting switches that switch the polarity in conjunction with each interlocking switch group and the communication processing means to the disable status if the switching polarities of the status setting switches do not match A communication processing apparatus according to claim 1 or 2, further comprising: 6. A programmable controller, comprising the communication processing device according to claim 1, claim 2, claim 3, claim 4, or claim 5.