iSMA-B-W0202 Modbus User Manual
version 1.2
Page 23 / 49
Fast counter (40023-40024, 40025-40026)
The module has two 32-bit counters for Special Input. The counter’s value is stored in non-
volatile memory (EEPROM).
Input
Registers
S1
LO – 40023, HI - 40024
S2
LO – 40025, HI - 40026
Table 21 Fast counters registers for Special Inputs
In the case you would like to change the value of the register you can write any value (called
preset) for pulse counting registers. In the particular case, you can reset the counter by entering
0.
The counter reset is also possible by switching-on relevant bits in the register 40022.
WARNING!
In default fast counters work with 50Hz frequency. To change the frequency to 100
Hz, please refer to registers (40151 – 40152).
Resetting counters values (40022)
Setting true value for particular bit resets the corresponding counter according to the following
table:
No of register bit
Special Input Counter
0
S1
1
S2
Table 22 Resetting counters’ values
True value of the bit causes continuous resetting of the counter.
Setting the bit to 0 restores normal operation.