YOKOGAWA F3LR02-0N, Руководство пользователя

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B6-2
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
*1: When using F3SP05/08/21/25/35 Rev.8 or later, or F3SP22, 28, F3SP38, F3SP53, F3SP58 F3SP59, F3SP66,
F3SP67, F3SP71 or F3SP76.
*2: (1) Migration from a loop configuration to a daisy-chain configuration involves data loss.
In situations where the system continues operation, check the Subunit Line Switchover special register
and handle any loss of data accordingly.
(2) System operation after switching depends on the setting of switch SW1 located on the side of the module and
the configuration setup.
To enable loop switching, perform the following setup.
[Operation Control]
in the CPU Module’s Configuration Setup
Condition Switches of
F3LR02 Module
I/O Module Error
Subunit
Communication Error
SW1 SW3
Run Run (default) OFF ON
See Also B6.3.3 B6.3.3 B4.2.3 B4.2.5
Note
If the module has its Shutdown Output function (Condition Switch No. 1) set to ON, it treats a
transmission channel error due to, say, a broken fiber-optic cable or a powered-off main unit or a
powered-off substation in the transmission channel as a major failure of the sequence CPU module.
Thus, if a transmission channel error occurs with Condition Switch No. 1 set to ON, the output is either
shut down or held according to the DIO Setup ("Reset" or "Hold") of the CPU configuration.
Note
- For F3BP

, when the system switches to the secondary loop in the event of a
cable discontinuity in the primary loop, and when the system switches to 2 daisy-
chains in the event of cable discontinuity in both the primary and secondary loops,
accessing the substation may cause an error. In such situations, you should include
program codes for retry processing.
- When the system switches from a loop configuration to two daisy chains due to
cable discontinuity or substation power interruption, take note of the following
phenomena.
- Replacing a cable or switching on the substation again in online mode may
cause an I/O error. Hence, always do so in offline mode (i.e., when the master
station and all substations are switched off).
- If cable discontinuity happens again, the transmission loop switching function
may not work. Furthermore, output states (reset or hold) are not assured.