16
•
750-643 [MP-Bus Master Module]
Process
data
WAGO-I/O-SYSTEM
750
I/O
Modules
Extended status byte (S1)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MC3 MC2 MC1 MC0 ERR FMA DR DA
DA
Data Acknowledge (toggle mode). Confirmation that the new output data have been accepted.
DR
Data Request (toggle mode). New input data are ready for acceptance.
FMA
Function macro active.
ERR
The returned message code has an error. In this case, the data D0-D9 are structured differently
depending on the error.
MC0, MC1,
MC2, MC3
Message code (MSG_CODE).
Control byte (C0)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
REG
0 0
DPID
0 0 0 0
DPID
Partial packet ID, 0 = first partial packet, 1 = second partial packet.
REG
0 = Process data exchange / 1 = Register communication.
0 Reserved
Extended control byte (C1)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MC3 MC2 MC1 MC0 0
0 DA DR
DR
Data Request (toggle mode). New output data are ready for acceptance.
DA
Data Acknowledge (toggle mode). Confirmation that the new input data have been accepted.
MC0, MC1,
MC2, MC3
Message code (MSG_CODE).
0 Reserved
The data from the individual sensors are not mapped in the process image of
the connected controller, but are packed in the MP-Bus telegrams and
tunneled through to a function module in the application. This function
module decodes the telegrams so that the analogue or digital sensor data can
be subsequently evaluated and processed at application level.
The IEC application can be implemented in the connected programmable
fieldbus controller (PFC) of the fieldbus node with the WAGO-I/O-PRO or
WAGO-CAA programming tool.
