Modbus Plus language objects
Explicit exchange language object
Introduction
Word objects
222
This page describes all the language objects for explicit exchange in Modbus Plus communication that can be displayed or modified by the application program (PL7
Micro/Junior/Pro ; Communication applications ; Volume 1).
The table below shows the different word objects for explicit exchange.
Object (1) Function
%MWxy.MOD.2
Module status
%MWxy.i.2
%MWxy.i.3
%MWxy.i.4
Standard channel status
Specific channel status
Status of link layer
Specific channel status
Peer Cop l l l l l l l l l l l l l l
Meaning l l x0 = 1: defective module x1 = 1: functional error (error between the processor and the module, adjustment or configuration error, …) x2 = 1: terminal block fault (not connected) x3 = 1: self-tests running x4 = 1: reserved x5 = 1: error in hardware or software configuration (the module present is not the one declared in the configuration, the submodules are not compatible) x6 = 1: module missing x7 = 1: error in one of the sub-modules x0 = 1: only station on the network x1 = 1: not used x2 = 1: transmission line error x3 = 1: not used x4 = 1: internal software fault x5 = 1: hardware or software error or no configuration x6 = 1: processor communication error x7 = 1: application fault (double station address)
Byte 0 l l l
= 0: initialization phase
= 3: awaiting token phase
= 4..10: normal status
Byte 0 l l l l l
= 0: station being tested
= 32: normal status
= 64: no token
= 96: only station (idem x0 of %MWxy.i.2)
= 128: two stations have the same number
(idem x7 of %MWxy.i.2)
TLX DS COM PL7 xxE
Object (1)
Key
(1)
Function Meaning
Address xy.i
l l l x: corresponds to the rack number y: corresponds to the module number i: corresponds to the channel number
Modbus Plus language objects
TLX DS COM PL7 xxE
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