Process Image; Overview - WAGO -I/O-SYSTEM 750 Manual

2.1.1.8

Process Image

The 750-636 DC Drive Controller provides 6 bytes of input and output
process image to the fieldbus coupler/controller via 1 logical channel.
The position data to be sent and received is stored in 4 output bytes
(D0 ... D3) and 4 input bytes (D0 ... D3). Two control bytes (C0, C1) and 2
status bytes (S0, S1) control the I/O module and the drive.
In addition to the position data in the input process image (D0 ... D3), it is
possible to display extended status information (S2 ... S5).
NOTICE
Mapping the process data of some I/O modules (or their variations) into the
process image is specific to the fieldbus coupler/controller used. Both this
information and the specific configuration of the relevant control/status
bytes, are located in the section on "Fieldbus Specific Configuration of
Process Data", which describes the process image of the particular
coupler/controller.
2.1.1.8.1

Overview

Offset
Bit 3 of control byte C1 (C1.3) switches between the process data and the
extended status bytes in the input process image.
Bit 3 of status byte S1 (S1.3) acknowledges the switching process.
WAGO-I/O-SYSTEM 750
I/O-Modules
Input Data
ExtendedInfo_ON
= 0
0 Status byte S0
1 Status byte S1
2
3
Process data
D0 ... D3
4
5
750-636 [DC Drive Controller]
ExtendedInfo_ON
= 1
Status byte S0
Status byte S1
Ext. status bytes
S2 ... S5
• 15
Process Image
Output Data
Control byte C0
Control byte C1
Process data
D0 ... D3