Siemens FM 450-1 - Page 73

Setting counter once with input 1I2 (2I2)
The following 󹪝gure shows counter 1 being set once with input 1I2. The situation is analogous
for counter 2 with input 2I2. In the case represented here, only ENSET_UP is set, i.e., the counter
is set during up counting.
The relevant counter is set with the 󹪝rst rising edge at input 1I2, as long as ENSET_UP is set. If you
want to set this counter again, 󹪝rst you must reset the relevant ENSET_UP and then set it again.
Then the next positive edge at input 1I2 results in the counter being set.
Count pulses
ENSET_UP
Counter set
Counter not set Counter not set
Counter set
Input 1I2
Figure 8-7 Single setting of counter 1 with input 1I2
Multiple setting of the counter with input 1I2 (2I2)
The following 󹪝gure shows the multiple setting of counter 1with input 1I2. The situation is
analogous for counter 2 with input 2I2. In the case represented here, only ENSET_UP is set, i.e.,
the counter is set during up counting.
The relevant counter is set with the 󹪝rst rising edge at input 1I2, as long as ENSET_UP is set. When
you reset ENSET_UP you cannot set the counter with input 1I2. Only after you have set ENSET_UP
again will the next positive edge at input 1I2 result in the setting of the counter.
Count pulses
ENSET_UP
Input1I2
Counter set
Counter set
Counter not set
Counter set
Figure 8-8 Multiple setting of counter 1 with input 1I2
Modes, settings, parameters and commands
8.11 Command: Set counter
Counter module FM 450-1
Equipment Manual, 03/2022, A5E03648739-AC 73