Yokogawa JUXTA VJ Series Limit Alarms - Manual (Page 34)

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<3. PC Link Communication >
IM 77J01J11-01E
3.3.2 Communication with UT Link Module
Communication with FA-M3 is achieved by simply connecting the VJ Series to a UT
link module using the PC link communication protocol. Set the communication
conditions of the VJ Series signal conditioners identical to those of the UT link
module.
Maximum overall cable length of 1200 m
for a maximum of 31 substations
030401E.EPS
Model of UT link module: F3LC51-2N
FA-M3
The UT link module function has the following three modes, which allow you to communi-
cate with FA-M3 without being aware of it. For more information, see the optionally avail-
able "UT Link Module Instruction Manual (IM 34M6H25-01E)."
1. Automatic mode
This mode enables the instruments' fixed devices (those that cannot be specified by
the user) to be constantly refreshed by reading from and/or writing to them. The fixed
devices are D0001 to D0015, and the read areas cannot be written to.
2. Customize mode (constant access)
This mode reads and refreshes the instrument's devices (those that can be specified
by the user).
See Also
The devices mentioned here are D registers and I relays. For more information on D registers and I
relays, see Chapters 6 and 7.
3. Command Action
This mode allows access to be made as necessary.
3rd Edition : Oct. 15, 2007-00