Hitachi NJI-350B - Manual (Page 276)

Chapter 13 Troubleshooting
13-1
Chapter 13 Troubleshooting
13.1 Error Display and Actions
The display locations of errors detected by individual device in the MICRO-EH system are shown in Figure 13.1. When
an error occurs, take an action according to the error code list.
OK
POW
RUN
LADDER EDITOR
for Windows® LADDER EDITOR
OK Lamp
L/E for Windows® error display L/E error display
Figure 13.1 Error display locations of the MICRO-EH
(1) Error display
(a)
Error display on the main unit
The MICRO-EH will perform self-diagnostic tests using the microcomputer, and when there is an error the contents
are indicated in the combination of lit/flashing/not lit of the OK and RUN lamps located in the front of the main unit.
See the error code list and action in Chapter 12, for the detailed error codes and actions.
(b) Programmer error display
Error codes encountered during program device operation, such as duplicate definition error, undefined error,
operation error, program over, etc., will be displayed on the programming device. For detailed error codes,
refer to the error code list in the programming device manual.
(c) GPCL error display
The error detected by the CPU during the GPCL operation is displayed at the bottom left of the screen. For
the details of error codes, see the list of error codes in the GPCL manual.
(d) Setting in the special internal output
An error code is set in the special internal output area (such as WRF000). The smaller the error code value,
the more serious the error is. When two or more errors occur, the smaller number is set. For example, if “71”
(battery error) and “31” (user memory error) occur simultaneously, “31” is set. If the levels are the same, the
cause code generated last will be displayed.
The clearing of error special internal output is performed by setting the special internal output R7EC to “1.”
The R7EC can be set to “1” either by connecting the programming device or by including a subprogram that
sets the R7EC using external input within the program. (If turning R7EC on by the program, always set it on
after the error cause has been verified. However, if R7EC is turned on by a program that would generate a
congestion error, the system may clear the error cause and rerun after detecting a congestion error.)
Note: Error codes are set in hexadecimal values. Verify error codes by setting the monitor to hexadecimal
display.