Parameter Settings For Using Dedicated Instructions; When Using Data Link Instructions; Precautions For Dedicated Instructions - Mitsubishi Electric QJ71E71-100 User Manual

15.2

Parameter Settings for Using Dedicated Instructions

When using dedicated instructions, set the parameters of each function.
15.2.1

When using data link instructions

When using data link instructions, set the following parameters.
• Station No. <-> IP information setting
• Routing parameters setting
For details on the settings, refer to the following.
MELSEC-Q/L Ethernet Interface Module User's Manual (Application)
15.3

Precautions for Dedicated Instructions

This section describes precautions for using dedicated instructions.
(1) When changing data specified by dedicated instructions
Do not change any data (e.g. control data) until execution of the dedicated instruction is completed.
(2) When the dedicated instruction is not completed
Check that "Online" has been set under "Mode" in the network parameter window. Dedicated instructions cannot
be executed during offline.
(3) Securing service process time
When accessing a programmable controller on another station using a data link instruction during the Ethernet
diagnostics, execution of the instruction may be delayed. Take the following measures to execute the data link
instruction after the Ethernet diagnostics. (For safety CPUs, the following measures cannot be applied.)
• Execute the COM instruction.
• Reserve time for a communication process for 2 to 3 ms.
• For a Basic model QCPU, High Performance model QCPU, Process CPU, and Redundant CPU, set
the service processing time in Time reserved for communication processing (SD315).
• For a Universal model QCPU, configure "Service Processing Setting" in the "PLC System" tab of the
PLC parameter window.
CHAPTER 15 DEDICATED INSTRUCTIONS
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