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iSMA-B-MINI/MIX Modbus User Manual
www.ismacontrolli.com
DMP262en | 1st Issue rev. 8 | 05/2022
page 52 of 107
Figure 41. The cooling mode algorithm
7.6.3 Time Value Registers (40177,40181,40185,40189)
The registers contain time values for TIME RELAY modes. The time unit depends on the
selected mode [milliseconds] or [seconds].
7.6.4 Command Register (40020)
The module is equipped with a special register called COMMAND (40020). The Command
register is used to remotely execute the action (simulate light switch/PIR). The action is
executed by changing the state of the relevant bit (changing from false to true). All special
application modes can be executed except for Input Forwarding, Heating, and Cooling
modes.
No. of Bit in the Register (40020)
Command Input Number
0
1
1
2
2
3
3
4
Table 36. Command register for special application modes
7.6.5 Block Inputs Register (40021)
The Block Inputs register is used to block the physical input signals to take action in logic.
By setting a true value on the relevant bit, the module blocks the input and no action will
WARNING!
In case when the temperature sensor fails (if it is disconnected or shortcut), the
heating mode does not work and the output remains in the false state.