Prosoft-technology MVI46-MCM Bedienungsanleitung PDF herunterladen (Seite 59)

MVI46-MCM ♦ SLC Platform Reference

Modbus Communication Module User Manual

ProSoft Technology, Inc. Page 59 of 108

March 29, 2011

5.1.4 Functional Specifications

Modbus Master

A port configured as a virtual Modbus Master actively issues Modbus commands

to other nodes on the Modbus network, supporting up to 100 commands on each

port. The Master ports have an optimized polling characteristic that polls slaves

with communication problems less frequently.

Command List

Up to 100 command per Master port, each fully configurable for

function, slave address, register to/from addressing and word/bit count.

Polling of command list

Configurable polling of command list, including continuous and on

change of data, and dynamically user or automatic enabled.

Status Data

Error codes available on an individual command basis. In addition, a

slave status list is maintained per active Modbus Master port.

Modbus Slave

A port configured as a Modbus slave permits a remote Master to interact with all

data contained in the module. This data can be derived from other Modbus slave

devices on the network, through a Master port, or from the SLC processor.

Node address 1 to 247 (software selectable)

Status Data

Error codes, counters and port status available per configured slave

port

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Prosoft-technology MVI46-MCM Bedienungsanleitung Seite 59