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Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units register)
Value range /
Setting options
Access
level
9591
Unsigned / 2
Fail-safe activa‐
tion condition
Fail-safe activation con‐
dition.
1
● 0: Bad status of
selected process
value
● 1: Active
Maintenance alarm
or Failure (NAMUR)
Read /
write
9281
Unsigned / 2
Fail-safe min.
time
Minimum time the out‐
put stays in fail-safe be‐
havior.
0
[s]
0 - 100
Read /
write
9261
Unsigned / 2
Fail-safe behav‐
ior
Pulse output reaction in
case of a fault.
Only applicable if Re‐
dundancy mode (9280)
= 0.
0
● 0: Last valid value
● 1: Hold. Value 0.0
substitutes the actual
input value
● 2: Disabled
● 3: Custom value
Read /
write
7431
Float / 4
Fail-safe value
Output value in case of
a fault and when Fail-
safe behavior (9261) is
configured to 4.
0.0
[pulses/s]
0.0 - 12500.0
Read /
write
7158
Float / 4
Forced value
Forced value when
forcing is active.
1.0
[pulses/s]
0.0 - 12500.0
Read /
write
Channel 3 status output settings (relay)
Table 4-39
Channel 3 status output settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units register)
Value range /
Setting options
Access
level
9141
Unsigned / 2
Status mode
Select the functionality
for the status output.
0
● 0: Alarm class
● 1: Alarm item
Read /
write
9158
Unsigned / 2
Alarm class
Bit encoded selection
of alarm classes which
impact the status out‐
put. Each diagnostic
event is allocated to an
alarm class. See Alarm
items (Page 145).
Applicable if Status
mode = 0.
0
● Bit 0: Process value
alarm (PA)
● Bit 1: Process value
warning (PW)
● Bit 2: Maintenance
alarm (MA)
● Bit 3: Maintenance
warning (MW)
● Bit 4: Maintenance
required (MR)
● Bit 5: Function check
(FC)
Read /
write
MODBUS commands
4.10 Modbus holding registers tables
FCT030 Modbus (From firmware 4.0)
Function Manual, 06/2018, A5E39931813-AB
101