Mitsubishi QJ71LP21 User Manual

App - 4 App - 4
MELSEC-Q
APPENDIX
Table 1 Special link relay (SB) list (Continued)
Use permitted/prohibited
Control
station
Normal
station
Remote
master
station
Remote I/O
station
No. Name Description
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
SB0007
(7)
Clear forward loop
transmission errors
Clears the line abnormal detection (SW0CC) of the forward loop
side to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
SB0008
(8)
Clear reverse loop
transmission errors
Clears the line abnormal detection (SW0CD) of the reverse loop
side to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
6
SB0009
(9)
Clear loop switch count
Clears the loop switch count (SW0CE to 0E7) to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
SB000A
(10)
Clear transient
transmission errors
Clears the transient transmission errors (SW0EE, SW0EF) to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
SB000B
(11)
Transient transmission
error area setting
Designates whether to overwrite or retain the transient
transmission errors (SW0F0 to SW0FF).
Off: Overwrite
On: Retain
SB0011
(17)
Data link operation
designation
Designates the data link operation.
Off: No switch instruction
On: Switch instruction (valid when on)
When On is detected, data link switches from Online (normal
data link) operation to Online (debug) operation, or from Online
(debug) operation to Online (normal operation).
Debug operation
Online operation
SB0011
Debug operation
SB0014
(20)
Remote sub-master
station switching
command
Forcibly directs the remote sub-master station that is performing
master operation to shift to sub-master operation. (It is invalid for
the redundant system.)
Off: Without directive
On: With directive
SB0018
(24)
System switching
monitoring time setting
valid flag
Indicates whether the system switching monitoring time setting
(SW0018) is valid or invalid in case of a data link error.
Off: Invalid
On: Valid (valid at the time of startup)
SB0020
(32)
Module status
Indicates the network module status.
Off: Normal
On: Abnormal
SB0040
(64)
Network type
(host)
Indicates the network type set with the parameters of the host's
network module.
Off: PLC to PLC network
On: Remote I/O network
SB0041
(65)
Host station's redundant
function support
information
Indicates the station supports the redundant function or not.
Off: Redundant function not supported
On: Redundant function supported
SB0042
(66)
Power supply status of
host
Indicates the external power supply status to QJ71LP21S-25.
(When using QJ71LP21-25, 0 is ON.)
Off: Not supplied
On: Supplied
SB0043
(67)
Online switch
(host)
Indicates the mode set by the switch of the host's network
module.
Off: Online (mode setting is 0 or 4); "Parameter setting mode
becomes valid"
On: Other than online (mode setting is other than 0)
6: The SB0009 should be kept on until the SW00CE becomes "0."

Mitsubishi QJ71LP21 Specifications

General

Brand	Mitsubishi
Model	QJ71LP21
Category	Controller
Language	English