YOKOGAWA F3LR02-0N, Руководство пользователя

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C6-5
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
C6.2 Shutdown Output on Transmission
Channel Error Function
C6.2.1 Overview of Shutdown Output Function
The FA-bus Type 2 module is equipped with a function, which shuts down the output of
the I/O module of a subunit when a transmission channel error occurs.
This function prevents an error in the FA-bus type 2 or a powered-off main unit or a
powered-off
intermediate station from affecting the entire system or resulting in
hazardous or unstable system operation.
For instance, when a cable discontinuity occurs, the module detects a transmission
channel error and immediately turns off the output signals of each I/O module on the
subunit to minimize risks.
A transmission channel error that occurs at a subunit can be propagated to other
subunits to shut down their I/O modules connected to the channel.
The shutdown output on transmission channel error function is available only for
configurations with one CPU module (not a multi-CPU system).
Note
- This function is not available in a multi-CPU configuration.
- When using F3SP05, F3SP08, F3SP21, F3SP25 and F3SP35 CPU modules (Rev.
8 or later), this function is only available for output modules with 32 outputs or less.
- When using CPU modules F3SP22, F3SP 28, F3SP38, F3SP53, F3SP58, F3SP59,
F3SP66, F3SP67, F3SP71 or F3SP76, this function is available for output modules
with 32 outputs or less, as well as F3YD64-1F, F3WD64-3F, F3WD64-4F, and
F3YD64-1P.
- Do not enable the Shutdown Output function in a loop configuration.
C6.2.2 Shutdown Output Function Setup
Table C6.4 Shutdown Output Setup
SW1 Condition Switch
of F3LR02
[Output When Stopped] setting
in [DIO Setup]
of CPU Module
’s Configuration
To shutdown output ON (Shutdown) (default) Reset (default)
To hold output
*1
OFF (Hold) Hold
See Also C4.2.2 C6.3.3
*1: Continues operation if a transmission channel is secured and system operation is to be continued.
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 cable or a powered-off main unit or a powered-off
intermediate station 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.
Table C6.5 shows the operation of the output modules and FAIL signal contact for
different setup configurations and transmission channel error locations. In the table,
subunit A, subunit B, and subunit C are defined as follows:
Subunit A: A subunit that is nearer to the main unit than the location of a channel
error so that sending to and receiving from the main unit are still
available through the transmission channel between the subunit and
main unit