CTH200 Series PLC User Manual
Open project online window through Station >Open ONLINE
Seek symbols showing diagnostic equipment state and fault condition. Press the F1 to open
the help page of the diagnostic symbol to view the comments for the diagnosis.
Select menu PLC >Faulty Modules to view fault modules list. If there is a failure, the view
will not update automatically when open the online view. Select view>update to display the
current state.
【Read diagnosis information in master and slave station】
In HW-config, you can open the module information to get detailed diagnostic information.
Double-click for displaying the fault modules.
For DP master, select Diagnostic Buffer symbols to view fault information
For SM 277B station equipment: select the General symbol to view module status. Select
the DP Slave diagnostics TAB, and click the Hex. Format button display the diagnostic bytes
of SM277B.
H.3.4 power budget of diagnosis module
SM 277B offer a 5 VDC logic
power for all expansion
modules in system
SM 277B offer a 24VDC sensor
power for expansion modules or
anywhere needed.
The additional electricity
sum of all SM277B
expansion modules require
less than 660mA
Please confirm power demand less
than the budget 400mA
Power budget of SM277B, including 5VDC and 24VDC, is to calculate if there is sufficient power
for its connected expansion modules.
Warning
Do not use SM277B DC sensor and another external power to power for one device.
Do not use two powers on one device
Connecting an external 24VDC power to SM277B 24VDC sensor power supply will
cause conflict. Which may result in shortened service life of the power supply or
failure of both power supplies, which may then lead to failure of PLC system
operation. Accidental operation may result in serious personal injury or even death,
and/or equipment damage.
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