Troubleshooting
- 60 -
02.20
909.2710.1-06
9.10 Monitoring bus voltage
The bus voltage is monitored by the DSP (Process) directly. As soon as the bus voltage is too low or too
high, the machine will stop and displays the corresponding error message:
E22
: Mains undervoltage 1
E23
: Mains overvoltage
E30
: Mains undervoltage 2
Should the mains voltage be too low at both power units (at S5 or S8 / P4500 or P5500), only the error
message with the highest number is displayed (E30).
Schematic
bus voltage LED4 LED6
optocoupler min. bus
volt (pin 10)
optocoupler max. bus
volt (pin 9)
error message
0-250V
on
off
high
low
E22 / E30
255V - 700V
on
on
low
low
-
705V - ∞
off
on
low
high
E23
Tab. 33:
Voltage limits
