Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 221

6 PROGRAMMING
No.
SB0069 Multiplex transmission designation
SB006A Multiplex transmission status
No.
System switching monitoring time setting
SB0018
valid flag
Host station's redundant function support
SB0041
information
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(11) Checking the multiplex transmission status
The multiplex transmission status is checked through the GX Developer network
diagnostics, but it also can be checked with link special relay (SB) and link
special register (SW). (Refer to Section 8.1.3.)
1) If the "With multiplex transmission" box is checked in the
supplementary settings of common parameters, Multiplex transmission
designation (SB0069) is turned ON.
2) An execution of the multiplex transmission function turns ON
Multiplex transmission status (SB006A).
3) Data showing the forward and reverse loop states during multiplex
transmission are stored in the following link special registers (SW).
• Multiplex transmission status (1) (SW00B0 to SW00B3)
• Multiplex transmission status (2) (SW00B4 to SW00B7)
Description
(12) Checking the redundant system status
The redundant system status can be checked with link special relays (SB) and
link special registers (SW).
(a) Checking the redundant system support and setting
1) When the network module supports the redundant system, Host
station's redundant function support information (SB0041) is ON.
2) To set the time taken from detection of a data link stop until system
switching is requested in the redundant system, set a time value in
System switching monitoring time setting (SW0018).
3) If System switching monitoring time setting valid flag (SB0018) is
turned ON, System switching monitoring time setting (SW0018) is
enabled.
Description
No.
SW00B0 to
Multiplex transmission status (1)
SW00B3
SW00B4 to
Multiplex transmission status (2)
SW00B7
No.
SW0018 System switching monitoring time setting
MELSEC-Q
Description
Description
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