YOKOGAWA UM33A User Manual

15-5
IM 05P03D21-01EN
Troubleshooting, Maintenance, and Inspections
15
15.1 Troubleshooting
Errors during Operation (2)
The errors shown below may occur during operation.
PVdisplay
(Operation
Display)
Setpointdisplay
(Operation
Display)
Statusindica-
tor (Operation
Display)
Parameter
that
displayser-
ror details
Error description Cause and diagnosis Remedy
Normal
indication
0.000 00000
(Decimal point
on the left of the
Symbol display
blinks)
–
Setup
parameter
(OP.ER)
Communication error
(RS-485
communication)
Framing parity error
Bufferoverow
Inter-character time-
out
Checksum error (PC
link communication
with checksum)
CRC check error
(Modbus/RTU)
LRC check error
(Modbus/ASCII)
Check the
communication
parameters.
Recovery at normal
receipt.
Hold down any key
to stop blinking.
Normal
indication
0.000 00000
(Decimal point
on the left of the
Symbol display
blinks)
–
Setup
parameter
(OP.ER)
Userproleerror
Userproleis
corrupted.
Download the user
proleagain.
Normal
indication
Normal indication
Rightmost
decimal point
on Symbol
display blinks.
Setup
parameter
(PA.ER)
Faulty FRAM
Writing (storing) data
to FRAM is impossible.
Faulty. Contact us
for repair.
Undened Undened – – Faulty MCU MCU is corrupted.
Faulty
Contact us for repair.
Undened Undened – –
Faulty DCU (ROM/
RAM error, corrupted)
DCU is corrupted.
Faulty
Contact us for repair.
Errors during Operation (Input/output Action)
Error
description
PV input
Retrans-
mission
output
Alarm
action
Analog output
(retransmission
output)
Contact
input
Contact
(alarm)
output
Communi-
cation
Communication error
(RS485 communication)
Normal action
Normal
action
Normal
action
Normal action
Normal
action
Normal
action
Normal
action
Userproleerror Normal action
Normal
action
Normal
action
Normal action
Normal
action
Normal
action
CC-Link
communication
is disabled
Faulty FRAM Normal action
Normal
action
Normal
action
Normal action
Normal
action
Normal
action
Normal
action
Faulty MCU Undened Undened Stopped 0% or less OFF OFF Stopped
Faulty DCU (ROM/RAM
error, corrupted)
Undened Undened Stopped 0% or less OFF OFF Stopped

YOKOGAWA UM33A Specifications

General

Brand	YOKOGAWA
Model	UM33A
Category	Touch Panel
Language	English