Siemens Synco 700 RMZ785 Basic Documentation page 117

Configuration
Note
Function diagram
based on
1-speed motor
Key
118 / 216
Siemens
Building Technologies
8.4.9 Precommand checkback signal
You can configure a "Precommand checkback signal" for each motor block in
addition to the precommand. The "Precommand checkback signal" provides
information on if the precommand was implemented (e.g. via valve or damper end
position switch). Only then is the motor switched on.
Main menu > Commissioning > Extra configuration > Aggregates > Motor > Motor 1...6 >
Operating line
Precommand checkback
signal
A fault message is displayed and the motor does not start if no "Precommand
runup time" is issued within the set "Precommand checkback signal". Precommand
"Off" is issued after the "Precommand rundown time".
If the "Precommand checkback signal" drops off during motor operation, the motor
is switched off immediately and precommand "Off" is issued after expiration of
"Precommand rundown time". A fault message is displayed. The fault message is
removed only after acknowledgement and reset.
Using the "Precommand checkback signal" is sensible only if combined with the
configured precommand.
Normal operation
On
Start-
condition
Off
Motor A
Motor B
Motor
On
operating state
Off
Precommand
On
checkback
Off
On
Precommand
Off
PcmdRnup
On
Motor fault
Off
Fault message
acknowledged
+ reset
PcmdRnup = Precommand runup time
PcmdRndw = Precommand rundown time
Switching and monitoring device RMS705B
Aggregates
Range
---, N.X1, N.X2,...
(digital inputs only).
Precommand
checkback signal
missing
PcmdRnup
PcmdRndw
PcmdRndw
Factory setting
---
Precommand
checkback signal
lost during operation
PcmdRndw
PcmdRnup
CE1P3124en
01.04.2010