Siemens TX-I/O TXM1.8U - Page 43

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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Digital output functions 2018-10-25
• If the difference between the stroke model and the process value (∆Y) is more than
half the deadband plus the hysteresis, this generates an OPEN or CLOSE pulse
which is long enough to return the actuator to a position within the deadband.
• The minimum pulse length is equal to the runtime multiplied by the hysteresis.
Y
_
+
0
Hys
Hys
Nz
t
10761D99
Start synchronization, if selected, is automatically initiated after reset.
The synchronization is not interrupted by any other event.
• NONE No synchronization
• SINGLEOPEN OPEN command during 1.5 x runtime OPEN
• SINGLECLOSE CLOSE- command during 1.5 x runtime CLOSE
Synchronization when stroke model reaches the end position (0% or 100%):
• Normal operation:
– NONE (default)
No synchronization
– CONTINUOUS
Permanent synchronization (0% and 100%)
– CONTINOPEN
Permanent synchronization (100%)
– CONTINCLOSE
Permanent synchronization (0%)
– SINGLE
1.5 * Rise Time (100%) or 1.5 * Fall Time (0%)
– SINGLEOPEN
1.5 * Rise Time (100%)
– SINGLECLOSE
1.5 * Fall Time (0%)
– EVERY10MIN
1.5 * Rise Time (100%) or 1.5 * Fall Time (0%)
every 10 minutes
– EVERY10MINOPEN
1.5 * Rise Time (100%) every 10 minutes
– EVERY10MINCLOSE
1.5 * Fall Time (0%) every 10 minutes
– EVERY20MIN
1.5 * Rise Time (100%) or 1.5 * Fall Time (0%)
every 20 minutes
– EVERY20MINOPEN
1.5 * Rise Time (100%) every 20 minutes
– EVERY20MINCLOSE
1.5 * Fall Time (0%) every 20 minutes
• Local override:
OPEN or CLOSE relay is active as long as button is pressed, synchronization is
disabled.
• Tool override, Remote Override: in the end positions, CONTINOPEN /
CONTINCLOSE applies, i.e. OPEN or CLOSE relay goes to maintained contact.
If this behavior is not desired, command the actuator to 0.1% / 99.9% instead of 0% /
100%.
For commissioning purposes, a synchronization can be forced:
• NONE No synchronization
• CONTINOPEN Continuous OPEN command
• SINGLEOPEN OPEN command during 1.5 x runtime OPEN
(series D and higher)
• CONTINCLOSE Continuous CLOSE command
• SINGLECLOSE CLOSE- command during 1.5 x runtime CLOSE
(series D and higher)
Deadband / Hysteresis
(Nz, Hys)
Start synchronization
(series D and higher)
Synchronization in
end position
Forced synchronization
Parameterization