JPH0142239Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an input scanner device that sequentially selects desired signals from among a large number of input signals and supplies them to a signal processing circuit.

Input scanner devices generally consist of a selection contact section that switches input signals using contacts such as relays, and a controller section that controls the operation of these contacts, and operates according to sequences stored in the controller section. There is. In addition, the selection contact sections are grouped into units for a certain number of input points or types of input, and by installing these printed boards called scanner cards in the connector section of the device, it is possible to handle any number and type of input points. are doing. However, the sequence of the controller section differs depending on the type of scanner card and the number of scanner cards installed, and the sequence of the controller section must be reassembled each time the scanner card is replaced.

The present invention aims to eliminate the above-mentioned drawbacks of conventional devices and to realize an input scanner device with a simple configuration that does not require reconfiguring the sequence of the controller section even when a scanner card is replaced.

In the input scanner device of the present invention, a sequence according to the type of scanner card is stored in advance in the controller section, and the scanner card is equipped with a function to generate a code signal representing the type, and this code signal is read at the same time as the scanner card is selected. , the card is driven in a sequence suitable for that card.

Hereinafter, the input scanner device of the present invention will be explained using the drawings.

FIG. 1 is a block diagram showing an embodiment of the input scanner device of the present invention. In the figure, SC ₁ and SC ₂ are scanner cards, CNT is a controller, and AD is an analog-to-digital converter. The scanner cards SC ₁ and SC ₂ each have a plurality of input signals S ₁₁ to
S _1o , S ₂₁ ~ _{S 2o} are applied, and the output is an analog-to-digital converter which is a signal processing circuit.
Supplied to AD. The controller unit CNT reads the code signals generated from each scanner card SC ₁ and SC ₂ and drives each scanner card SC ₁ and SC ₂ in a sequence corresponding to the code signals. The controller CNT also has a function to switch the scale constant etc. of the analog-to-digital converter AD according to the characteristics of _{the input signals S 11 to S 1o} and S ₂₁ to _{S 2o applied} to the scanner cards SC 1 and SC 2. This is also included as part of the sequence.

FIG. 2 is a block diagram showing a specific example of a scanner card used in the input scanner device of the present invention.
In the figure, the same parts as in FIG. 1 are designated by the same reference numerals. Q ₁ and Q ₂ are transistors, DC is a decoder, and R ₁ to _Ro are relays. Also, C ₁ , C ₂
is the card designation signal, Si is the code signal, Sad is the channel designation signal, and +Vcc is the power line. Scanner cards SC ₁ and SC ₂ are connected to the signal line of the controller CNT by connectors, and
A plurality of input signals are selectively supplied to the signal processing circuit by contacts of relays R ₁ to _{R o} .

Card specification signals C ₁ , C ₂ ... are controller
For example, if a card designation signal _C1 is generated sequentially by the CNT, the transistor _Q2 becomes operational in the scanner card _SC1 . Here, the transistor _Q2 is inserted at an arbitrary position with respect to the signal line for 3 bits, and its conduction forms a code signal Si representing the type of scanner card _SC1 . controller
The CNT reads the code signal Si generated in response to the application of the card designation signal _C1 , and
In addition to determining the type of SC ₁ , it also detects the presence or absence of a scanner card. If no code signal is generated in response to the card designation signal, it is determined that no card is attached to the connector, and the process moves on to the designation operation for the next scanner card. controller
The CNT selects a sequence according to the read code signal Si, generates a channel designation signal Sad, and also sets the scale constant of the analog-to-digital converter. The channel designation signal Sad is converted by the decoder DC into relay drive signals from _D1 to _D0 , and sequentially drives the relays _R1 to _R0 .

In this way, when the sequence for the scanner card SC ₁ is completed, the controller CNT transmits the card designation signal C ₂ for the next scanner card SC ₂ .
occurs, and follow the same steps as above to scan the scanner card.
Drive SC ₂ . Here, multiple Sukiyana cards
The signal lines for code signal Si and channel designation signal Sad in SC ₁ and SC ₂ are connected to the controller.
Although they are connected in parallel to the CNT, each scanner card does not generate the code signal Si unless the card designation signal is applied, and the relays R ₁ to _{R o} do not operate, so multiple scanner cards cannot operate simultaneously. It won't happen.

As mentioned above, the controller CNT receives the code signal Si generated from each scanner card SC ₁ and SC ₂ .
Since the sequence is selected based on the controller, even if the scanner card is replaced, the controller
There is no need to reassemble the CNT sequence, and different types of cards can be used at the same time. Further, if no scanner card is attached to the connector, the operation shifts to the next card, so that a scanner circuit can be configured by simply attaching the required number of scanner cards to the connector.

In addition, in the above explanation, the controller
In addition to driving scanner cards SC ₁ and SC ₂ , CNT also
We explained that it also changes the scale constant in the analog-to-digital converter AD, but the controller CNT can also be used to adjust the state of the signal processing circuit to the characteristics of the input signal, such as controlling the gain of the preamplifier and changing the range. It performs various controls.

As explained above, in the input scanner device of the present invention, a sequence corresponding to the type of scanner card is stored in advance in the controller section, and the scanner card is provided with a function to generate a code signal representing the type, so that the input scanner device according to the present invention Since this code signal is read and the card is driven in a sequence suitable for the card, an input scanner device with a simple configuration that does not require reconfiguring the sequence of the controller section even when the scanner card is replaced can be realized. I can do it.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block diagrams showing one embodiment of the input scanner device of the present invention. SC ₁ , SC ₂ ... scanner card, CNT ... controller, AD ... analog-digital converter, Q ₁ , Q ₂ ... transistor, R ₁ to R _o ... relay, DC ... decoder.

Claims (1)

[Scope of utility model registration request] In an input scanner device that has a controller section that controls the operation of multiple scanner cards using a card select signal and a channel designation signal, and sequentially selects a large number of input signals and supplies them to a signal processing circuit, this occurs when a card select signal is applied. Multiple scanner cards each generate a unique code signal and output it to the signal line according to the signal, and multiple types of sequences for generating channel designation signals in any order are stored in advance and cards are selected sequentially for multiple scanner cards. An input scanner device comprising a controller section which applies a signal, receives a code signal generated from the scanner card, reads out a sequence corresponding to the code signal, and generates a channel designation signal according to the sequence.