Byte 29: Function Check 1; Byte 31: Fieldbus Status; Byte 32: Sil Indications - AUMA AUMATIC AC 01.2 Manual

Actuator controls
AC 01.2/ACExC 01.2 Modbus RTU
Table 21: Byte 29: Function check 1
Bit Designation
(process representation)
0 Bit: Local STOP
1 Bit: Sel. sw. not REMOTE
2 Bit: Service active
3 Bit: Handwheel active
4 Bit: EMCY stop active
5 Bit: PVST active
6 —
7 —
Table 22: Byte 31: Status Feldbus
Bit Designation
(process representation)
0 Bit: Channel 1 active
1 Bit: Channel 2 active
2 Bit: Channel 1 DataEx
3 Bit: Channel 2 DataEx
4 Bit: Chan 1 FailState field-
bus
5 Bit: Chan 2 FailState field-
bus
6 Bit: Channel 1 activity
7 Bit: Channel 2 activity

Byte 29: Function check 1

Causes of the Function check signal in accordance with NAMUR recommendation
NE 107.
Value Description
1 Push button STOP of the local controls is operated.
0 No signal
1 Selector switch is in position Local control (LOCAL) or 0 (OFF).
0 Selector switch is in position Remote control (REMOTE).
1 Operation mode Service is active.
0 No signal
1 Manual operation is active (handwheel is engaged); optional indication
0 No signal
1 Operation mode EMERGENCY stop is active (EMERGENCY stop button has been
pressed).
0 EMERGENCY stop button not pressed (normal operation).
1 Partial Valve Stroke Test function (PVST) is active.
0 No signal
No signal (reserved)
No signal (reserved)
Byte 30: Function check 2
The contents are reserved for further Function check signals in accordance with
NAMUR recommendation NE 107.

Byte 31: Fieldbus status

Information on the fieldbus status.
Value Description
1 Channel 1 is the active operation command channel.
0 No signal
1 Channel 2 is the active operation command channel.
0 No signal
1 Channel 1 is in the data exchange state.
0 No signal
1 Channel 2 is in the data exchange state.
0 No signal
1 No valid fieldbus communication via channel 1 (application does not communicate
with the DCS).
0 No signal
1 No valid fieldbus communication via channel 2 (application does not communicate
with the DCS).
0 No signal
1 Bus communication available on channel 1.
0 No signal
1 Bus communication available on channel 2.
0 No signal

Byte 32: SIL indications

Detailed information of an optional SIL sub-assembly.
Description of the data interface
23