Western Reserve Controls 1782-JDO Uživatelský manuál stáhnout pdf (Strana 7)

Western Reserve Controls, Inc. 1782-JDO User’s Manual

PRELIMINARY

1.1 Optomux Command Summary

The JDO supports the following B1 commands:

• Power-up Clear (command A)

• Reset (command B)

• Enhanced Digital Watchdog (command m)

• Configure Positions (command G)

• Read Module Configuration (command j)

• Write Outputs (command J)

• Read Status (command M)

1.2 Basic Operation

The JDO operates as the DeviceNet front-end to the Optomux B1 brainboards. The

DeviceNet Master can receive and send data to and from the 1782-JDO via the methods

described in this section. It formats and sends the data to the B1s and accepts responses

from the B1, which are reformatted and passed back to the DeviceNet system as required. In

short, the JDO behaves like an Optomux scanner that is connected to DeviceNet.

The JDO has one DeviceNet address. All DeviceNet messages to the JDO are sent to this

address. All DeviceNet messages to and from the B1’s are sent to the JDO DeviceNet

assembly objects using poll commands.

The JDO Parameter Object allows you to define the specific operation of each JDO and the

attached B1’s. These parameters include all the set-up required for the serial comm. link.

The following chart defines the various messaging methods used for data types at your serial

device and a brief explanation follows.

Table 1-1 I/O Message Types

Typical Data Polled Cyclic Bit-Strobe Change-of-State Explicit Message

Commands √√

Status √√

Parameters √√

The general sequence of events and operation is explained below:

1. Configure the JDO for the number of brainboards (type B1) to be connected and the

input/output definition of each.

2. Each B1 has 9 associated parameters, including it Optomux address, input/output

1 2 3 4 5 6 7 8 9 10 11 12 ... 26 27

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Western Reserve Controls 1782-JDO Uživatelský manuál Strana 7