
B-62714EN/04 OPERATION 2.LCD-MOUNTED TYPE 16i/18i/21i-A, Power Mate i-D/H
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ERROR STATUS
ERROR STATUS (1 byte) :
Communication line errors detected by the master station are
indicated in hexadecimal.
bit 7bit 6bit 5bit 4bit 3bit 2bit 1bit 0
Bits 7 to 5 : Reserved (0 at all time)
Bit 4 : Abort detection
Bit 3 : CRC error detection
Bit 1 : Detection of data consisting of an incorrect number of bits
Bit 0 : Receive buffer overflow
LINK STATUS with remote slave stations
Link status with remote slave stations #1 to #[MAX SLAVE NO]:
The detailed status of communication with each slave station are
indicated (1 byte each):
"NO" : Slave station number
"LINK" : Status of the link with a slave station
"SERV" : Code representing a service where an error was
detected
"LAYR" : Code representing a communication layer where an
error was detected
"CODE" : Code representing the cause of an error
Table III-2-5 indicates the communication status patterns indicated by
LINK STATUS.
LINK SERV LAYR CODE Description Cause/action
ON 00H 00H 00H
Input/output normal:
Input/output service is being
performed with a target slave station
normally.
---------------------
OFF 00H 00H 00H
During initialization:
A target slave station is being polled
for initialization service.
Turn on the power to a target slave
station or make a target slave station
ready for communication.
ER01 30H 81H 20H
Initialization instruction rejected:
An attempt to perform initialization
service for a target slave station is
rejected by the slave station because
of an initialization parameter
mismatch.
Check the initialization parameters (I/O
SIZE, slave type) of the master station
and target slave station.
ER02 30H 80H A1H
Invalid initialization response
parameter:
Initialization service was performed for
a target slave station, but an
initialization success response
returned from the slave station is
invalid
A response from the target slave station
includes a protocol-related error.
If this error occurs frequently, ask the
manufacturer of the target slave station
to make a check.