Siemens SIMATIC S7-300 FM 350-1 - Page 110

Operating Modes, parameters and commands
7.3 Count modes
FM 350-1 Counter module
110 Manual, 05/2011, A5E03648639-01
Setting and Resetting the Outputs
If you set the behavior of an output to "Inactive", you can set and reset enabled outputs
using the appropriate bits in the DB.
Table 7- 18 Setting and Resetting the Outputs
Output ... Is set by ... Is reset by
DO0 SET_DO0 = 1 SET_DO0 = 0
DO1 SET_DO1 = 1 SET_DO1 = 0
Behavior of the Digital Outputs
For both digital outputs you can program one of 7 possible responses to reaching the
comparison value. The various options are shown in the table below.
Table 7- 19 Behavior of the Digital Outputs Depending on the Parameterization
Digital Output
Parameter
Assignment
Behavior of the Digital Outputs
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Inactive
The output remains deactivated and is not affected by the comparison value,
zero crossing, overflow, or underflow events. The output DOx may be used
purely as a digital output. When enabled, it can be set and reset with the
SET_DOx bit.
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Active from
comparison value to
overflow *
The output is set to 1 if the counter is in the range between the comparison
value and overflow.
Setting the counter to a value between the comparison value and overflow
sets the output to 1.
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Active from
comparison value to
underflow *
The output is set to 1 if the counter is in the range between the comparison
value and underflow.
Setting the counter to a value between the comparison value and underflow
sets the output to 1.
Active on reaching
the comparison value
for pulse duration
(up)*
W
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