Siemens SIMATIC ST-1500 Function Manual page 197

Using the module
5.2 Using the digital input module
High counting limit
You limit the counting range by setting the counter high limit. The maximum value for the
counter high limit depends on the module:
High counting limit
Maximum value
Default
You must enter a value that lies above the counter low limit.
Counter low limit
You limit the counting range by setting the counter low limit. The minimum value for the
counter low limit depends on the module:
Counter low limit
Minimum value
Default
You must enter a value below the counter high limit.
Start value
By configuring the start value, you specify the value at which counting is to start. You must
enter a value between the counting limits or equal to the counting limits.
The default setting is "0".
Comparison value 0
By configuring a comparison value (Page 87), you specify the counter value that controls the
STS_DQ reset bit based on the comparison function that was selected under "Set output".
You must enter a value which is greater than or equal to the counter low limit and less than
comparison value 1.
The default setting is "0".
Comparison value 1
By configuring the second comparison value (Page 87), you specify the additional counter
value that controls the STS_DQ reset bit based on the comparison function that was
selected under "Set output".
You must enter a value which is greater than comparison value 0 and less than or equal to
the counter high limit.
The default setting is "10".
196
DI 8x24VDC HS
2147483647 (2 –1)
31
2147483647
DI 8x24VDC HS
–2147483648 (–2 )
31
–2147483648
DI 32x24VDC HF,
DI 16x24VDC HF
4294967295 (2 –1)
32
4294967295
DI 32x24VDC HF,
DI 16x24VDC HF
0 (not configurable)
0
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG