Prosoft-technology MVI56E-GSC/ GSCXT Manual do Utilizador descarregar pdf (Página 82)

Reference MVI56E-GSC ♦ CompactLogix or MicroLogix Platform

User Manual Enhanced Generic ASCII Serial Communication Module

Page 82 of 140 ProSoft Technology, Inc.

May 9, 2014

Read-Only Devices

Read-Only devices are those that only receive data from the module. An

example of this type of device is a printer. The printer will generate output or be

controlled based on the data it receives on its communication port.

Ladder logic is used to construct the write blocks to be sent to the module. When

the module receives a new write block containing data, it will transmit the data

out the port. The Block Sequence Number used in the write block should be the

one received on the last read block.

The data flow diagram for a read-only device is shown below:

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 139 140

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Prosoft-technology MVI56E-GSC/ GSCXT Manual do Utilizador Página 82