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Siemens
TX-I/O™ Module system – Functions and operation
CM110561en_08
Building Technologies
Digital output functions
2018-10-25
5.6 Pulse
(BO Pulse)
For control and switching single stage electrical loads by means of pulses.
•
Connection diagrams: see module data sheets.
•
Step switches, pulse switches, bistable relays: see Q250, section 5.2.
•
The function uses one I/O point.
•
The TX-I/O relay modules have changeover contacts
•
The process value must be written in "Triger mode". As a result, a pulse will be
created on each change of the process value from 0 to 1 or 1 to 0.
Without the trigger bit, no pulse will be created.
•
The pulse time can be adjusted 0.1...25.5 (default = 0.5s)
•
The break time can be adjusted 0.1...25.5 (default = 0.1s)
•
After start-up, process quality is invalid, as long as no pulse has been generated.
Writing to Process value
Process value
Relay "ON"
Pulse/pause time
I/O status LED
BreakTime
PulseTime
Active
Inactive
Relay Active
Relay Inactive
105
61
D
04
ON
OFF
PulseTime
"0"
"1Trg" "1Trg"
"0Trg"
"1Trg"
"1"
"0"
An additional ON or OFF pulse can be generated (e.g. by means of the local override).
•
Pressing the override button (in the middle enables/disables local override
•
When local override is active:Pressing "+" or "–" generates a pulse and writes to the
process value (with trigger bit).
•
The
I/O status LED
lights up concurrently with the relay activity.
•
Local operation can be disabled in the configuration.
•
The
I/O status LED
is ON when the
relay
is active.
•
In the case of an error the module status LED and the I/O status LED flash.
For details, especially in relation to flashing pattern and errors: refer to the section "Dis-
play, operation and diagnostics" in the TX-I/O™ Engineering and installation guide [6].
Application
Notes
Hardware
Function
Local override
Display