Siemens SIMATIC ET 200S Operating Instructions Manual page 161

Parameter
Mode
Counting mode
Gate function
Input signal HW gate
Function DI
Synchronization
2
Main count direction
High counting limit
DO1/DO2 diagnostics (wire break) is possible only with pulse lengths of > 90 ms on digital output DO1/DO2.
1
Only relevant if Function DI = Synchronization on positive edge or HW enable for synchronization
2
Parameter Assignment Error
• Incorrect mode
• Incorrect main count direction
• The "Input signal HW gate" parameter is set to inverted and the "Function DI" parameter
• High counting limit incorrect
• The value for the behavior of DO2 is not set to output although "Switch at comparison
• The value for hysteresis does not equal 0 although "Switch at comparison values" has
• Function DI incorrect
• "On" is set for diagnostics N although "Off" was set for diagnostics A and B.
What to Do in the Event of Errors
Check the set value ranges.
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
Value Range
Continuous counting/
One-time counting/
Periodic counting
Cancel counting/
Interrupt counting
Normal/Inverted
Input/
HW gate/
latch and retrigger at positive edge/
synchronization at positive edge/
latch at positive edge/
HW enable for synchronization
Once only/Periodic
None/Up/Down
2 ... 7FFF FFFF
is not set to HW gate.
values" has been assigned for DO1.
been assigned for DO1.
1Count5V/500kHz
3.6 Count Modes
Default
Count continuously
Cancel counting
Normal
Input
Once-only
None
7FFF FFFF
161