User-Defined Errors; Non-Fatal Errors - Omron CPM2C Operation Manual

Self-diagnostic Functions
!WARNING
5-2-2

User-defined Errors

FAILURE ALARM –
FAL(06)
1,2,3...
SEVERE FAILURE ALARM
– FALS(07)
1,2,3...
MESSAGE – MSG(46)
5-2-3

Non-fatal Errors

196
due to malfunction of the PC or another external factor affecting the PC oper-
ation. Not providing proper safety measures may result in serious accidents.
The PC will turn OFF all outputs when its self-diagnosis function detects any
error or when a severe failure alarm (FALS) instruction is executed. External
safety measures must be provided to ensure safety in the system. Not provid-
ing proper safety measures may result in serious accidents.
There are three instructions that can be used to define errors or messages.
FAL(06) causes a non-fatal error, FAL(07) causes a fatal error, and MSG(46)
sends a message to the Programming Console or host computer connected
to the PC.
FAL(06) is an instruction that causes a non-fatal error. The following will occur
when an FAL(06) instruction is executed:
1. The ERR/ALM indicator on the CPU Unit will flash. PC operation will con-
tinue.
2. The instruction's 2-digit BCD FAL number (01 to 99) will be written to
SR 25300 to SR 25307.
The FAL numbers can be set arbitrarily to indicate particular conditions, but
the same number should not be used as both an FAL number and an FALS
number.
To clear an FAL error, correct the cause of the error and then execute FAL 00
or use a Programming Device to clear the error.
FALS(07) is an instruction that causes a fatal error. The following will occur
when an FALS(07) instruction is executed:
1. Program execution will be stopped and all outputs will be turned OFF.
2. The ERR/ALM indicator on the CPU Unit will be lit.
3. The instruction's 2-digit BCD FALS number (01 to 99) will be written to
SR 25300 to SR 25307.
The FALS numbers can be set arbitrarily to indicate particular conditions, but
the same number should not be used as both an FAL number and an FALS
number.
To clear an FALS error, use a Programming Device to switch the PC to PRO-
GRAM Mode, correct the cause of the error, and then clear the error.
MSG(46) is used to display a message on a Programming Device connected
to the CPM2C. The message, which can be up to 16 characters long, is dis-
played when the instruction's execution condition is ON.
PC operation and program execution will continue after one or more of these
errors have occurred. Although PC operation will continue, the cause of the
error should be corrected and the error cleared as soon as possible.
Section 5-2