Parameterizing and diagnosis functions for all bus couplers
PCD0
26/766 E2
(HB_PCD0 26 766_E2.DOC)
SAIA-Burgess Controls Ltd.
Page 151
10.9
Function 5 Set preferred shut-off state
Function 5 provides a preferred shut-off state to define the shut-off
behavior of outputs. The preferred shut-off state is adopted:
·
If the bus connection is interrupted.
·
In STOP mode
Each module can have its own shut-off code (AC) which defines its
preferred shut-off state.
Diagnose Output
Diagnose Input
Byte 3
Byte 2
Byte 1
Byte 0
Byte 3
Byte 2
Byte 1
Byte 0
EC/BC
Diagnose Output
Byte 3, AC (shut-off codes)
Shut-off codes
Meaning
dec.
bin.
0
0000 0000
All digital outputs on the respective expansion
module are set to Low, all analog outputs are set
to 0V / 0mA.
1
0000 0001
All outputs on the respective expansion module
are set to High, all analog outputs are set to
+10V / 20mA.
2
0000 0010
All outputs on the respective expansion module
continue to be refreshed. If the bus connection is
interrupted the last control status of the I/O
channels is retained.
Default setting: Shut-off code 0 for all modules
Byte 2, n (position of module)
You have to enter the position (n) of the module for which you want to
define the preferred shut-off state.
Module location numbers:
The LOCK configuration overrides the preferred shut-off state.
