358 I/O Modules
WAGO-I/O-SYSTEM 750
750-882 Media Redundancy ETHERNET Controller
Manual
1.5.0
Output Process Image
Offset
Byte Destination
Description
High Byte
Low Byte
0
C1
C0
Control byte C1 Control byte C0
1
D1
D0
Setpoint position
Setpoint position
(LSB)
2
D3
D2
Setpoint position
(MSB)
Setpoint position
13.2.5.9 Stepper Controller
750-670
The Stepper controller 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 406: Stepper Controller RS 422 / 24 V / 20 mA 750-670
Input Process Image
Offset
Byte Destination
Description
High Byte
Low Byte
0
reserved
S0
reserved
Status byte S0
1
D1
D0
Process data*) / Mailbox**)
2
D3
D2
3
D5
D4
4
S3
D6
Status byte S3
Process data*) /
reserved**)
5
S1
S2
Status byte S1 Status byte S2
*)
Cyclic process image (Mailbox disabled)
**)
Mailbox process image (Mailbox activated)