Lenze MCH Series - Manual (Page 77)

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19.4 SETPOINT REFERENCE SOURCES
The setpoint reference input can be one of the following:
1.
Keypad (p and q keys)
2. 4-20 mA signal at TB-5B
3. 0-10 VDC signal at TB-5A
4. Potentiometer signal at TB-5A
5. PRESET #1, #2, and #4 (Parameters 1, 2, and 4)
Parameter 24 - AUTO SOURCE selects the PID setpoint reference. If more than one
setpoint reference is required, then AUTO SOURCE must be set to SELECTED, and
the TB-13 terminals must be used to select the desired reference.
NOTE:
The default setting of AUTO SOURCE is 4-20 MA, so AUTO SOURCE
must be changed if the setpoint reference is anything other than a 4-20 mA
signal.
Remote setpoint reference inputs at TB-5A and TB-5B can only be used if that terminal
is NOT being used for the process feedback signal from a transducer. The MCH has
only one analog input of each type, so the same type of signal cannot be used for
transducer feedback and setpoint reference. For example, a 4-20 mA signal from a
transducer could not be used as a feedback signal if the setpoint is being controlled by
a 4-20 mA signal from a PLC.
If the keypad is the setpoint reference source, the p and q keys are used to adjust the
setpoint. This is done while the drive is in the "normal" operation display as illustrated
herein.
42.53 HZ 35.0 PSI
57 % LOAD AUTO
Example PID setpoint of 35.0 PSI
To change the PID setpoint, simply
press the p and q keys (example
setting changed to 40.5 PSI)
48.31 HZ 40.5 PSI
64 % LOAD AUTO
CURSOR