Function Set To Freq. Control / Linear Working Mode - Hach sc1000 User Manual

PWM CONTROL/PID CONTROL
INPUT VALUE

6.3.3.8 Function set to FREQ. Control / Linear working mode

FREQ. Control / Linear
SET FUNCTION
LINEAR
PID CONTROL
SET TRANSFER
HIGH ALARM
LOW ALARM
HIGH ALARM
LOW ALARM
INPUT VALUE
Displays the process value read from the selected source after it has been processed by the
internal formula parser (if prompted).
With the PWM CONTROL/PID CONTROL the relay generates a PWM
(Pulse-Width-Modulated) signal with an on/off ratio trying to control the process value.
Default value: LINEAR
There are two SET FUNCTION menus.
First menu: Selects the basic function of the relay.
Second menu: Defines whether the output frequency signal is depending linear to the process
value or the output frequency signal is working as a PID controller.
Signal is linearly dependent on the process value.
Signal works as a PID controller.
Default value: 0 seconds
Sets a substitute output frequency when some error conditions are detected in the selected
source or if the source is missing.
Default value: 1 second
Sets the duration cycle in seconds of the output frequency when the process value reaches the
HIGH ALARM limit.
Default value: 10 seconds
Sets the duration cycle in seconds of the output frequency when the process value reaches the
LOW ALARM limit.
Default value: 15
Determines at which process value the duration cycle of the output frequency has got the value
set at HIGH ALARM.
Default value: 5
Determines at which process value the duration cycle of the output frequency has got the value
set at LOW ALARM.
Displays the process value read from the selected source after it has been processed by the
internal formula parser (if prompted).
Advanced Operations
103