MC³ 24.96.EX O&M Manual Page 66 08/14/01 4:34 PM/LDD
No Serial Communications
1. Check all cables and wire harness
2. Check the serial port settings in Communications on page 44 (baud rate, data bit, stop bits,
parity.)
Hang Message Appears
The hang screen message will appear if an error occurs within the control software that could
effect the safe operation of the system. If the hang screen appears, write down the exact error that
is displayed on the screen and call customer support at Merrick Industries. Several types of errors
may cause the controller to reset or reboot. If this occurs verify all parameters.
HARDWARE CALIBRATION AND TESTING
The MC³ was calibrated and tested at the factory before it was shipped. The following procedures
can effect the accuracy of the controller and should only be performed with extreme caution.
WARNING: Always disconnect the MC³ from the feeder before attempting to test or calibrate hardware. Failure
to do so could damage the feeder or cause personal injury.
Analog Outputs
1. Attach a milliamp meter to the analog output to be adjusted.
2. In the Analog Output setup menu, select ‘Feeder Control’ and ‘0-20mA’ for the output that you
are calibrating.
3. In the setpoint menu, select ‘Manual Spd’. Set the controller output to 0%.
4. If you are calibrating analog output 1, adjust the ‘A01 Z’ pot (R68) until the meter reads 0.0
milliamps.
If you are calibrating analog output 2, adjust the ‘A02 Z’ pot (R66) until the meter read 0.0
milliamps.
5. In the setpoint menu, set the controller output to 100%.
6. If you are calibrating analog output 1, adjust the ‘A01 S’ pot (R67) until the meter reads 20.0
milliamps.
If you are calibrating analog output 2, adjust the ‘A02 S’ pot (R65) until the meter read 20.0
milliamps.
7. Set the controller output to 50% and verify that 10 milliamps is read on the meter.
Analog Inputs
Typically, a current source is not available, so the easiest way to adjust the analog input is to feed
the analog outputs back into the analog input. This can be done by using jumpers from the analog
output to the analog input. To calibrate the Analog Input using the 24.96.EX application you must
have access to the register editor. The following procedure assumes you are using analog output
1.
1. Jumper from analog output 1 to the analog input, make sure the polarity is correct (positive to
positive, negative to negative).
2. In the analog output menu, set analog output 1 to ‘Feeder Control’, ‘0-20mA’.
3. In the setpoint menu, select ‘Manual Spd’. Set the output to 0%.
4. Go to the register editor and select the al_aninst1 register (this is register 385 for version
0.3A).
5. Adjust ‘AIN Z’ (R64) until the register just reads 0 (the best way to do this is approach zero
from the positive side).
6. In the setpoint menu, set the output to 100%
To Next Page
Loading...
Need help?
General
