Mitsubishi Electric MELSEC-Q Series - Page 323

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CHAPTER 8 PROGRAMMING
8
8.3 Using Link Special Relay (SB) and Link Special Register (SW)
(b) RECV instruction
1. When data are stored in the own station channel area, the corresponding RECV execution request
flag (SB0030 to SB0037) turns ON.
Use a RECV execution request flag as a start contact to execute the RECV instruction.
Upon completion of the RECV instruction, the RECV execution request flag turns OFF.
2. Create an interlock with Baton pass status (own station) (SB0047) before executing the
instruction.
(c) ZNRD/ZNWR instruction
1. Create an interlock with the following link special relay (SB) and link special register (SW) before
executing an instruction.
• Baton pass status (own station) (SB0047)
• Baton pass status of each station (SB00A0) (When all stations are specified)
• Baton pass status of each station (SB00A0 to SW00A7)
2. If the ZNRD instruction failed, an error code is stored in ZNRD processing result (SW0030).
Check the error and take corrective actions according to the error code. ( Page 511, Section 10.2)
3. If the ZNWR instruction failed, an error code is stored in ZNWR processing result (SW0031).
Check the error and take corrective actions according to the error code. ( Page 511, Section 10.2)
No. Description No. Description
SB0030 RECV execution request flag (1)
—
SB0031 RECV execution request flag (2)
SB0032 RECV execution request flag (3)
SB0033 RECV execution request flag (4)
SB0034 RECV execution request flag (5)
SB0035 RECV execution request flag (6)
SB0036 RECV execution request flag (7)
SB0037 RECV execution request flag (8)
SB0047 Baton pass status (own station)
No. Description No. Description
SB0047 Baton pass status (own station) —
—
SW0030 ZNRD instruction processing result
SW0031 ZNWR instruction processing result
SB00A0 Baton pass status of each station
SW00A0
to
SW00A7
Baton pass status of each station