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請問歐姆龍的FUN49指令是什么意思
FUN49    (49)    Set System
    

Variations:

Differentiated variant available.

Purpose:

FUN49 is used to control the following 4 operating parameters:
1.    The battery check in system error checks. If FUN49 is executed and bit 00 of OPR1 is ON, the battery check will be excluded from system error checks when PLC power is turned ON.

2.    The initial operating mode. If FUN49 is executed and bit 01 of OPR1 is ON, the PLC will enter MONITOR mode when PLC power is turned ON (see Initial Operating Mode below).

3.    The Force Status Hold Bit (SR 25211). If FUN49 is executed and bit 06 of OPR1 is ON, the Force Status Hold Bit (SR 25211) will be effective when PLC power is turned ON.

4.    The I/O Status Hold Bit (SR 25212). If FUN49 is executed and bit 07 of OPR1 is ON, the I/O Status Hold Bit (SR 25212) will be effective when PLC power is turned ON.

Operand Data Areas:

OPR1    Parameters    # nnnn or 0 (IR0)

OPR2    Online switch    # nnnn or 0 (IR0)

OPR3    Password    # nnnn or 0 (IR0

甈roperty of Omron Corporation 1999-2002  All rights reserved.

我只知道第3操作數(shù)是密碼數(shù)，那第一。第二操作數(shù)是什么意思?謝謝樓上的老師。