
B-62714EN/04 OPERATION 3.Power Mate-D/F/H
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ERROR STATUS
ERROR STATUS (1 byte):
Communication line errors detected by the master station are
indicated.
bit 7bit 6bit 5bit 4bit 3bit 2bit 1bit 0
Bit 7 : LINK STATUS (status of the link with the master station)
- When LINK STATUS = 0, the link is disconnected.
- When LINK STATUS = 1, communication is performed normally.
Bit 6 : Short frame error
Bit 5 : Abort detection
Bit 4 : Detection of data consisting of an incorrect number of bits
Bit 3 : Overrun error detection
Bit 2 : FCS error detection
Bits 1, 0 : Reserved (0 at all times)
NOTE
Many errors are caused by hardware failures (on
communication boards or communication cables)
and noise. Recheck the method of communication
cable connection, terminating resistor, and noise
protection.
Status of communication with slave stations #1 to #31
Status of communication with slave stations #1 to #31:
The status of reception of DO data from remote slave stations is
indicated (1 byte for each).
bit 7bit 6bit 5bit 4bit 3bit 2bit 1bit 0
Bit 7 : LINK STATUS (status of the link with a remote slave station)
- When LINK STATUS = 0, the link is disconnected.
- When LINK STATUS = 1, communication is performed
normally.
Bits 6 to 0 : Reserved (0 at all times)
NOTE
1 When the value set in parameter No. 180 is not 0, a
32-byte communication status area is allocated.
2 When the value set in parameter No. 180 is 0, no
communication status area is allocated.