Siemens SIMATIC S7-300 FM 350-1 Manual page 112

Operating Modes, parameters and commands
7.3 Count modes
Status of the Outputs and Status Bits
The status of the two outputs is indicated by the green LEDs and the corresponding status
bits in the DB.
Table 7- 20
Table 7- 21
Status bits STS_CMP1 and STS_CMP2 indicate the current status of outputs DO0 and DO1.
If enabled, they are set by CTRL_DO0 and CTRL_DO1 if a comparison condition is fulfilled
and are reset if the condition is not fulfilled.
Status bits STS_COMP1 and STS_COMP2 are set by CTRL_DO0 and CTRL_DO1 if a
comparison condition is fulfilled, regardless of whether they are enabled, and remain set until
you acknowledge the status bits with RES_ZERO.
112
Output DO0
Comparison Enable bit
condition CTRL_DO0
Not fulfilled
Fulfilled
Output DO1
Comparison Enable bit
condition CTRL_DO1
Not fulfilled
Fulfilled
Status bit
STS_COMP1
0 0
1 0
0 1
1 1
Status bit
STS_COMP2
0 0
1 0
0 1
1 1
Status bit LED DO0
STS_CMP1/
Output DO0
0
0
0
1 Is lit
Status bit LED DO1
STS_CMP2/
Output DO1
0
0
0
1 Is lit
FM 350-1 Counter module
Manual, 05/2011, A5E03648639-01
Out
Out
Out
Out
Out
Out