Operating Manual CMGZ432
42
12 Trouble shooting
Error
Cause
Corrective action
„Err1“ is displayed:
A/D-converter receives
values < -9.7mV
continuously
Force sensors are wrong
connected
Exchange wires on terminals z6 / z8 (resp. 2 / 3)
Parting of the cable
Replace connection cable between force sensor
and electronik unit
„Err2“ is displayed:
A/D-converter receives
values > 9.7mV
continuously
Force sensors are wrong
connected
Exchange excitation and signal (terminals z4 ...
z10 resp. 1 ... 4)
Short circuit in the plug or
connection cable
Check and correct wiring
Force sensor overload
Use sensor with higher nominal force
Force sensor has too much
sensitivity
Set parameter
sensitivity
to the correct value or
use other sensor
„Alarm controller error“
is displayed
The control error has exceeded
the tolerance band set in
parameter
Alarm limit error
Enlarge parameter
Alarm limit error
or adjust
controller parameters (P; I; D) more accurate and
restart controlling (enable controller again)
Roller does stay when
enabling the controller;
ev. material cracking
Parameter
Start limit
set too
high
Decrease parameter
Start limit
Using pilot control: The line
speed signal gives „0“; tacho
generator defect
Check tacho generator and wiring to the terminals
d6 / d8 (resp. 7 / 8); replace if needed
Roller rewinds fast when
enabling the controller;
ev. material cracking
Parameter
Start limit
set too
low
Increase parameter
Start limit
Parameter
Start speed
set too
high
Decrease parameter
Start speed
Roller unwinds much too
fast when enabling the
controller
Using pilot control: The
diameter signal gives „0“;
diameter sensor defect
Check diameter sensor and wiring to the terminals
d6 / d8 (resp. 7 / 8); replace if needed
No message on the
display
Display contrast setting is bad
Set display potentiometer correctly. (It is located
on the processor board on the upper right edge
beside the ribbon connector)
Fuse blown
Replace fuse on power supply
Power supply not correct
Check / correct power supply
Electronic unit defect
Contact FMS customer service
