JPH02246643A - Control system for modem with monitor function - Google Patents

Abstract

PURPOSE:To revise an operation data suitably without causing any collision in data by interrupting the operating data sent from a remote side when the operation data caused from its own equipment is switched to be sent from a changeover control section. CONSTITUTION:When the operator sets the revision of the operation data to a MODEM 4 with monitor function, the input of operation data revision instruction or the like is applied by a keyboard. Thus, a changeover section 11 is thrown to the position of an operation data transmission section 13 and the operation data is sent. Since the operation data is sent together with destination (MODEM 4 with monitor function), the required MODEM 4 with monitor function receives a relevant operation data and is operated by using the data. Moreover, the operation data of a controller 1 is sent with priority to the MODEM 41 with monitor function.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a control system for a modem with a monitoring function in a network system configured to include a modem with a monitoring function.

(Prior Art) Conventionally, in a network system in which multiple data terminal equipment (DTE) are connected via a modem and a line, it is necessary to provide the modem with a line monitoring function in order to save the trouble of separately installing a monitoring device. is being carried out. A modem configured in this manner is called a modem with a monitoring function.

This modem with a monitoring function allows external data such as transmission speed to be appropriately set and changed, and a controller for this setting and change is connected. Here, a plurality of controllers are connected in parallel, and as shown in FIG. 3, any one of the controllers 3011. 301
, 2, . . . it became possible to use changes in operational data (soft strap). Therefore, if a plurality of controllers 301 simultaneously change the operational data of the modem with monitoring function 300 to operate the system, the operational data will collide on the line, making it impossible to set or change the operational data accurately. The problem was that there was no.

(Problem to be Solved by the Invention) As described above, in the conventional control system for a modem with a monitoring function, multiple controllers are connected in parallel to the modem with a monitoring function, and if these controllers try to change the operational data at the same time, However, there was a problem in that data collisions occurred and operational data could not be set or changed accurately.

The present invention was made to solve the problems of the conventional control system for a modem with a monitoring function, and its purpose is to provide a monitoring function that can accurately change operational data even if there are multiple controllers. The purpose of the present invention is to provide a control system for an attached modem.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, a plurality of modems with a monitoring function are connected in cascade to the modem with a monitoring function in a network system including the modem with a monitoring function. The control system of the modem with monitoring function, which is composed of a controller that provides operational data to the controller, allows operational data sent from other controllers to pass through, or prohibits the passage of operational data sent from other controllers. A control system for a modem with a monitoring function is constructed by including a switching unit that switches whether or not to transmit operational data generated from the own device, and a switching control unit that controls switching of the switching unit based on switching instruction information.

(Function) According to the above configuration, when the switching unit is switched by the switching control unit to send out the operational data generated from the own device, the operational data sent from the side far from the modem with the monitoring function is transferred from the controller to the monitoring function. Without being sent to the attached modem, operational data can be changed accurately without data collision.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. In the figure, 11, 12, 13... indicate controllers,
These are connected in cascade through a modem 2 and a line 3, and a modem 41 with a monitoring function is connected to the controller 11. Modems with monitoring functions 41, 42,...48.・
... are connected by line 5 as shown in the diagram, and each is connected to DTE6.
1.62. ...68,... are connected.

The controller 1 includes a switching section 11 represented by a switch,
A switching control section 12 and an operation data sending section 13 are provided. These are actually composed of a microcomputer within the controller 1. The controller 1 has a keyboard (not shown), and when an operational data change command is input from the keyboard, the switching section 11 changes to the operational data sending section 13.
At other times, data is passed as shown in the figure. The operational data sending unit 13 sends out required operational data in response to instructions from a keyboard, and candidates for the operational data may be stored in advance, or may be input by an operator using keys. .

The actual configuration of the switching section 11 related to transmission and reception of the controller 1 is shown in FIG. Is 209 a receive buffer? , the data coming from the modem with monitoring function 41 is captured and held at a predetermined timing from the line 20B, and the data can be captured by the own device via the line 210.
modem 2 (monitoring modem 41) via line 211.
(more distant side) can be captured. 206 indicates a transmission buffer, which transfers data sent from modem 2 to line 2.
03, data sent via the AND gate 205 or from the own device to the line 201, the AND gate 204
It is possible to capture and hold the data via the line 20γ and send it to the modem with monitoring function 41 side via the line 20γ.

A control signal is given to the AND gates 204 and 205 from the microcomputer that constitutes the switching control unit 12 via the signal line 202, and when data is to be sent from the own device, the control signal is set to H level and the AND gate 204 receives the data. The control signal is set to L when passing data sent from another controller.
level, and the AND gate 205 is set in a state where data can pass.

In the network system configured as described above, the controllers "t", 12, 13, .
The data is passed through the modem. When an operator sets a change in operational data to the modem with monitoring function 4, the operator inputs an operational data change command or the like using the keyboard. As a result, the switching section 11 is switched to the operational data transmitting section 13 side, and the operational data is transmitted.

Since the operational data is sent together with the destination (modem 4 with monitoring function), the required modem 4 with monitoring function receives the corresponding operational data and operates using it.

As is clear from the connections in FIG. 1, priority is given to sending the operational data of the controller 1 that is closer to the modem with monitoring function 41.

[Effects of the Invention] As explained above, according to the present invention, when the switching control unit switches the switching unit to transmit operational data generated from the own device, the controller transmits the data from the side far from the modem with the monitoring function. Incoming operational data is not cut off and sent to the modem with a monitoring function, so that data collisions do not occur and the operational data can be changed accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of essential parts of an embodiment of the invention, and FIG. 3 is a block diagram of a conventional control system for a modem with a monitoring function. 11.12.13... Controller 21.22, 23, 24, 25... Modem 41-4'
8...Modem with monitoring function 61-68...DTE 111, 11□, 113. ...Switching parts 121, 12
2, 123. ...Switching control section 131, 132.13
3. ...Operation Data Transmission Department Agent Patent Attorney Book 1)
Takashi

Claims (1)

[Scope of Claims] A network system including a modem with a monitoring function includes a plurality of modems with a monitoring function connected in cascade, and a monitoring function configured by a controller that supplies operational data to the modem with a monitoring function. In a control system for a modem with an attached modem, switching that switches between passing operational data sent from other controllers, or prohibiting passage of operational data sent from other controllers and allowing operational data generated from the own device to be sent. 1. A control system for a modem with a monitoring function, comprising: a switching section; and a switching control section that controls switching of the switching section based on switching instruction information.