iSMA MINI Series - Command Register (40020); Block Inputs Register (40021); Setpoint Registers (40178,40182,40186,40190); Differential Registers (40179,40183,40187,40191)

MINI and MIX Series I/O modules/Modbus
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Command register (40020)
The module have special register COMMAND (40020). The command register is used for
remotely execute action ( simulate light switch/PIR). The action is executed by changing
state of relevant bit (changing from false to true). All special application modes can be
executed except Input Forwarding, Heating and Cooling modes.
No of bit in register
(40020)
Command input
number
0
1
1
2
2
3
3
4
Table 32 Command register for special application modes
Block Inputs register (40021)
The Block Inputs register is used to block physical input signals to take action in logic. By
setting true value on relevant bit the module block input and no action will be executed.
Setting false value restores normal operation. The block input function does not work when
the heating/cooling input mode is set.
No of bit in register
(40021)
Block input
number
0
1
1
2
2
3
3
4
Table 35 Block inputs register.
Setpoint registers (40178,40182,40186,40190)
The SETPOINT registers contain values which are used in heating/cooling modes (4U4O-H
and 4U4O-H-IP only) as the setpoints for heating/cooling control algorithm
The default Setpoint value is 21. (read more in Heating mode, Cooling mode).
The register stores the setpoint multiplied by 10.
Differential registers (40179,40183,40187,40191)
The DIFFERENTIAL registers contain values which are used in heating/cooling modes
(4U4O-H and 4U4O-H-IP only) as the differential for heating/cooling control algorithm.
Setpoint registers and Differential registers create deadband of the Control values which
has no influence on output.
Deadband = (Setpoint – Differential, Setpoint + Differential)