Lenze MCH Series Uživatelský manuál stáhnout pdf (Strana 77)

13435744_EDBMH01_v13 73

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

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 91 92

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Lenze MCH Series Uživatelský manuál Strana 77