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Exchanging Data with the CPU Unit Section 3-3
A424 00 to
12
Inner Board
Error Informa-
tion
The following flags provide details on Inner Board errors
(errors common to all Inner Boards as well as errors spe-
cific to Loop Controllers.)
---
00 Inner Board
WDT Error Flag
(fatal error)
This flag is set to 1 (ON) if the Loop Controller is faulty. 1: Inner Board WDT Error
0: Normal
01 Inner Board Bus
Error Flag
(fatal error)
This flag is set to 1 (ON) if an Inner Board Bus Error has
occurred.
1: Inner Board Bus Error
0: Normal
02 Cyclic Monitor
Error Flag
(fatal error)
This flag is set to 1 (ON) when a Cyclic Monitor Error is
detected, i.e., the cyclic area's access right token was not
returned to the Loop Controller within the cyclic monitor
time.
1: Cyclic Monitor Error
0: Normal
03 Flash Memory
Data Error or All
Function Block
Database
(RAM) Error
during Duplex
Operation Flag
(fatal error)
This flag is set to 1 (ON) in the situations outlined below.
Use the CX-Process Tool software to download all function
blocks (LCB/LCU unit). Alternatively, backup to flash mem-
ory.
When there is a flash memory data error during the data
check at a cold start.
A database (RAM) error occurred for all function blocks
during operation in duplex mode when mounted to a CS1D
CPU Unit.
1: Flash Memory Data
Error or All Function Block
Database (RAM) Error
0: Flash memory normal
and all function block data-
base (RAM) normal during
duplex operation
04 Incompatible
CPU Unit Error
Flag
(non-fatal error)
This flag is set to 1 (ON) when the Loop Control Board is
mounted in a CPU Unit other than a CS1-H CPU Unit.
Note: The CS1 CPU Units without the “-H” suffix do not
support the Loop Control Board.
1: The Loop Control Board
is mounted in a CPU Unit
that does not support the
Board.
The EM file memory has
been created or the EM
does not exist.
0: Normal
05 Not used. --- ---
06 CPU Bus Unit
Settings Area
Error Flag
(Loop Control Units only.) ---
07 Routing Table
Error Flag
(Loop Control Units only.) ---
08 Loop Controller
High Load Flag
(non-fatal error)
This flag is set to 1 (ON) when the LCB load rate exceeds
80% for three consecutive cycles. If this error occurs,
extend the operation cycles of function blocks that can be
extended. If the error recurs after extending the operation
cycles, add a Loop Control Unit and divert some of the load
to that Unit.
1: Loop Controller running
at a high load rate
0: Normal
09 Operation Cycle
Error Flag (non-
fatal error) (for
Process-control
CPU Unit
(CS1D-
CPU@@P) only)
This flag is set to 1 (ON) when the Loop Controller’s opera-
tion cycle is inaccurate because the cycle time is too long
(when the CPU Unit’s cycle time is more than 30% of the
minimum operation cycle of the Loop Controller for three
consecutive cycles) during duplex mode operation when
mounted in a CS1D CPU Unit.
1: Operation cycle error
0: Normal
Word Bit Name Explanation Settings
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