Burkert Type 8644 - Manual (Page 69)

8644/phoenix - 65
S
YSTEM
D
ESCRIPTION
Failsafe values are output values which become valid as output data in the event of disrupted
communication (watchdog comes into effect) or of a PLC stop. Depending on the application, different
values may be appropriate: You have a choice between:
• holding the last value
• issuing a zero
• adopting value from the data field
If you choose "Adopt value from data field", the freely selectable substitute values is adopted within the
data range, for digital output you have a choice between 0 and 1.
For an analogue module between FIXME:
–32512 and 32512 (bipolar) or 0 and 32512 (unipolar). These values are converted into a current or voltage
value according to the module and the data range being used.
Illustration:
Setting the
output be-
haviour of a
module
Failsafe values