15 NETWORK COMMON INSTRUCTIONS
15.1 Link Dedicated Instructions
1503
15
• These instructions read the data from the specified word device in the target station specified by the target network number
(J) and target station number (s1). Upon completion of reading the device data, the completion device specified by (d2)
turns on.
• For the target stations that can be specified, refer to the following.
Page 1449 Target networks and target station types
• The J(P).ZNRD instruction cannot be executed for RCPU. If executed, error code 4001H is stored in the
completion status and the instruction is completed with an error.
• The J(P).ZNRD instruction is an instruction (Q series compatible instruction) for replacement of the
equivalent instruction used in the programs running on the MELSEC-Q series. When creating a new
program, use the READ instruction.
• Device data can be read also from stations connected to networks other than the stations connected to the own station
network.
• The execution status and the completion status of the J(P).ZNRD instruction can be checked with the completion device
(d2) and the completion status indication device (d2)+1.
• Completion device (d2)
This device turns on during END processing of the scan where the J(P).ZNRD instruction completes, and turns off during the next END processing.
• Completion status indication device (d2)+1
This device turns on or off depending on the completion status of the J(P).ZNRD instruction.
When completed successfully: The device remains off.
When completed with an error: The device turns on during END processing of the scan where the J(P).ZNRD instruction completes, and turns off during the
next END processing.
J(P).ZNRD
(d1) (s2)
CPU module CPU module Network moduleNetwork module
[Own station] [Target station]
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