SCOM-100, User guide 42
dt: ‘Derivative time’ (D) value between 1-
200 sec. A zero value disables the
drivative part (not relevant for ON/OFF
control)..
ct: ‘Cycle time’ value between 1 and 15
minutes, representing the pulse width
modulation period of the digital output
(not relevant for ON/OFF control).
h: ‘Hysteresis’ value in [%] of the analog
input scale (0-20%) for ON/OFF control
(not relevant for PID control).
Changing the set point value
1255,id,sp
1255: Command ID.
id: Function block ID (1-4).
sp: Set point value in the range of the
analog input scale.
Setting the Function block state
The ON/OFF or PID control function block can be
enabled or disabled with this SMS command:
1251,id,s
1251: Command ID.
id: Function block ID (1-4).
s: 1: enable, 0:disable
Controlling the Function block state
A digital input can be configured to control the
Enabled/Disabled status of the function block.
The following command selects the digital input.