UM353-1B Maintenance
April 2012
10-7
10.4.2 On-Line Error Codes and Status Codes
These codes can be produced while the controller is running function block and may be actively controlling a
process. Depending on the message and its priority level, user intervention may be required or the message may
simply be informational in nature. Parameter “SE” located at Modbus register $40002 will reflect unacknowledged
error or status messages present in the controller. Messages are displayed according to priority until all active
messages have been acknowledged. If no link code has been assigned to the active message, the “SE” code will
remain at its last value.
Table 10-2 lists on-line error and status codes. For most error codes, replace the involved circuit board to repair the
controller. For most status codes, acknowledge or otherwise respond to the situation.
Table 10-2 On-Line Error and Status Codes
DISPLAYED
CODE
LINK/MODBUS
CODE (Hex/Dec)
DESCRIPTION
MPU A/D $0001 1 MPU Controller board A/D Error
EXP A/D $0002 2 I/O Expander Board A/D Error
AOUT1 OC $0003 3 MPU Controller board D/A #1 Open Circuit
AOUT2 OC $0004 4 MPU Controller board D/A #2 Open Circuit
AOUT3 OC $0005 5 MPU Controller board D/A #3 Open Circuit
AINU1 AD $0006 6 I/O Expander Board Universal Analog Input #1 A/D Error
AINU1 TC $0007 7 I/O Expander Board Universal Analog Input #1 T/C Burnout
AINU1 RJ $0008 8 I/O Expander Board Universal Analog Input #1 Reference Junction Error
AINU2 AD $0009 9 I/O Expander Board Universal Analog Input #2 A/D Error
AINU2 TC $000A 10 I/O Expander Board Universal Analog Input #2 T/C Burnout
AINU2 RJ $000B 11 I/O Expander Board Universal Analog Input #1 Reference Junction Error
UDIN E1 $000C 12 I/O Expander Board Universal Digital Input #1 Underflow Error
UDIN E2 $000D 13 I/O Expander Board Universal Digital Input #2 Underflow Error
MOD ERR $0010 16 Modbus Port Error
Watchdog $0013 19 Watchdog Timeout
LOW BAT $0014 20 Low NVRAM Battery Voltage
MMCÆMEM $0015 21 Press STORE to load MMC configuration into MPU memory
CYCLTIME $0016 22 Cycle Time Overrun – see STATN block – add Cycle Time bias
BURNFAIL $0017 23 Flash Memory burn failed
NO EXPBD $0019 25 Expander board is not installed
MB OVRUN $001C 28 Modbus communication error
A1 HI None Alarm A1 High
A1 LO None Alarm A1 Low
A1 HI D None Alarm A1 High Deviation
A1 LO D None Alarm A1 Low Deviation
A1 DEV None Alarm A1 Deviation
A1 OR None Alarm A1 Overrange
A2 HI None Alarm A2 High
A2 LO None Alarm A2 Low
A2 HI D None Alarm A2 High Deviation
A2 LO D None Alarm A2 Low Deviation
A2 DEV None Alarm A2 Deviation
A2 OR None Alarm A2 Overrange
A3 HI None Alarm A3 High
A3 LO None Alarm A3 Low
A3 HI D None Alarm A3 High Deviation
A3 LO D None Alarm A3 Low Deviation