Mitsubishi Electric C80 Series, Manual

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M800/M80/E80/C80 Series Alarm/Parameter Manual
5 System Alarms (Z)
88 IB-1501279-H
Details
An error occurs in the communication between the control unit and remote I/O unit.
Disconnection of a cable
Fault in remote I/O unit
Fault of power supply to remote I/O unit
The communication interrupted station is displayed in hexadecimal for each RIO channel when an error occurs
in the communication between the control unit and remote I/O unit.
When the control displays a communication stop station, it divides the RIO channel stations (up to 64 stations)
into groups of 8 stations. If any of the 8 stations has the communication stop error, the number is displayed with
the alarm.
Z55 RIO communication stop __ __ __ __ __ __ __ __
(a) (b) (c) (d) (e) (f) (g) (h)
(a)(b): RIO1
(c)(d): RIO2
(e)(f): RIO3
(g)(h): "00" fixed
(a)(b), (c)(d), and (e)(f) indicate the following stations in hexadecimal.
bit0: 1st to 8th stations
bit1: 9th to 16th stations
bit2: 17th to 24th stations
bit3: 25th to 32nd stations
bit4: 33rd to 40th stations
bit5: 41st to 48th stations
bit6: 49th to 56th stations
bit7: 57th to 64th stations
(Example) Stations #1 and #8 of RIO1 and stations #24 and #64 of RIO3 have the communication error.
Z55 RIO communication stop 0100 8400
The RIO error status can be monitored through the R registers on the self diagnostic or I/F diagnostic screen.
Remedy
 Check and replace the cables.
 Replace the remote I/O unit.
 Check the power supply (existence of supply and voltage).
Details
Program memory capacity has been set over the value that can be formatted.
An expansion device/expansion cassette has not mounted after formatting.
The mounted expansion device/expansion cassette is different from the one that was mounted at formatting.
Remedy
Check the followings.
 Program memory capacity
 Mounting of an expansion device/expansion cassette
 APLC release option
Details
A machine tool builder macro program has not been written to FROM after being registered/ edited/ copied/
condensed/ merged/ the number changed/ deleted.
Remedy

Write the machine tool builder macro program to FROM.
The program does not need to be written to FROM unless the editing operations and so on need to be valid
after the NC power OFF.
Z55 RIO communication stop
Z57 System warning
Z58 ROM write not completed