YOKOGAWA FA Link H2, User Manual

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5-3
IM 34M06H43-02E 2nd Edition : Sep.30, 2019-00
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 CPU Module Configuration Setup
The operation mode of a FA Link module is factory set to normal. Therefore, be
sure to set the link device capacity to “2048” during configuration setup. Otherwise,
the link device capacity of the CPU module will remain at its default value of “1024”
and the module will work only in this range (For details, see Section 3.9.1, “Setting
Device Capacities”).
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 Multi-CPU System
The FA-M3 controller supports configuration of multi-CPU systems. However, the
FA Link H2 modules must be used by only one sequence CPU module. The link
devices of a FA Link module may not be shared by multiple sequence CPU
modules. For a sequence CPU that does not use the FA Link H2 module, select [FA
Link Setup] from the Configuration tree pane, and then select “Manual Setup” and
set the “Link Type” to “Do Not Use” in WideField3.
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 Programming Precautions
- If a transmitting station fails, the contents of the data of that station are not
assured. To check whether the data of a station is valid, verify the status of the
station and the execution status of the sequence program of the said station
using special relays. If these states are normal, the data is correctly updated.
- The special relays associated with the status of the remote stations of the FA
Link are valid only when the local station is connected on the network (normal
communications). To verify that the local station is connected on the network,
check that the local station status (as indicated by a special register) is online.
- Link refresh applies only to those link relays and link registers used in the
instructions in a program ( for details, see Section 4.1.2, “Link Refresh Range”).
CAUTION
Whether the network is normal can be determined by checking whether the local
station status of the special registers (Z0065 and the corresponding link registers) is
online.
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