10
FUNCTIONS AND PROGRAMMING
10.2 Programming Using Bus Interface Functions
10.2.4 Programming using bus interface functions
10 - 16
9
UTILITY OPERATION
10
FUNCTIONS AND
PROGRAMMING
11
OVERVIEW OF
MULTIPLE CPU
SYSTEM
12
MULTIPLE CPU
SYSTEM
CONFIGURATION
13
MULTIPLE CPU
SYSTEM
CONCEPT
14
COMMUNICATIONS
BETWEEN CPU
MODULES
15
PARAMETERS
ADDED FOR
MULTIPLE CPU
16
PRECAUTIONS FOR
USE OF AnS SERIES
MODULE
(c) Precautions for self station device access via MELSECNET/H module
When making access via a MELSECNET/H module, create the user program so
that interlocks are provided to validate data writing/reading to the self station
device.
Data becomes valid only when the following conditions are satisfied.
• Self module status (SB20) is OFF (Normal)
• Self baton pass status (SB47) is OFF (Normal)
• Self data link status (SB49) is OFF (In data link)
Even if the above conditions are not satisfied, however, write to/read from the self
station is normally terminated.
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