
WAGO-I/O-SYSTEM 750
I/O Modules 391
750-882 Media Redundancy ETHERNET Controller
Manual
1.5.0
Output Process Image
Instance
Byte Destination
Description
High Byte
Low Byte
n
C1
C0
Control byte C1 Control byte C0
D1
D0
Setpoint position
Setpoint position
(LSB)
D3
D2
Setpoint position
(MSB)
Setpoint position
The specialty modules represent 1x6 bytes input and output data and seize 1
Instance in Class (0x67) and 1 Instance in Class (0x68).
13.3.5.9 Steppercontroller
750-670
The Steppercontroller RS422 / 24 V / 20 mA 750-670 provides the fieldbus
coupler 12 bytes input and output process image via 1 logical channel. The data
to be sent and received are stored in up to 7 output bytes (D0 … D6) and 7 input
bytes (D0 … D6), depending on the operating mode.
Output byte D0 and input byte D0 are reserved and have no function assigned.
One I/O module control and status byte (C0, S0) and 3 application control and
status bytes (C1 ... C3, S1 ... S3) provide the control of the data flow.
Switching between the two process images is conducted through bit 5 in the
control byte (C0 (C0.5). Activation of the mailbox is acknowledged by bit 5 of the
status byte S0 (S0.5).
Table 460: Steppercontroller RS 422 / 24 V / 20 mA 750-670
Input Process Image
Instance
Byte Destination
Description
High Byte
Low Byte
n
reserved
S0
reserved
Status byte S0
D1
D0
Process data*) / Mailbox**)
D3
D2
D5
D4
S3
D6
Status byte S3
Process data*) /
reserved**)
S1
S2
Status byte S1 Status byte S2
*)
Cyclic process image (Mailbox disabled)
**)
Mailbox process image (Mailbox activated)