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10 TEST FUNCTION
10.1 External Input/Output Forced On/Off Function
Behavior in batch-cancellation of forced on/off registrations
All the forced on/off registrations can be canceled in a batch.
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Behavior of the device
The behavior of the device is the same as that of cancellation of forced on/off (for each device). (
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CPU module operating status
The behavior of the device is the same as that of cancellation of forced on/off (for each device). (
■
LED status
The following describes the LED status after forced on/off registration is canceled in a batch.
*1 When other functions that use the FUNCTION LED are being executed, the LED indicator changes its status in accordance with the
status of the functions.
Precautions
The following describes precautions for using the external input/output forced on/off function.
• Multiple engineering tools connected to the network can be used to register forced on/off for the same CPU module. In this
case, note the following.
• If a direct device is used in a program, forced on/off registration is reflected when an instruction is executed.
Ex.
When X0 is forcibly turned off
• When the external input/output forced on/off function is executed while the program of high-speed internal timer interrupt
(I48, I49) is executed, the interval of programs of high-speed internal timer interrupt is short, and a large number of forced
on/off is registered, the scan time will increase and a WDT error may occur.
• Execution of interrupt programs which are executed at a fixed scan may delay depending on the number of forced on/off
registrations and the number of refresh points of each refresh processing.
• When forced on/off is registered in the multiple CPU system configuration, registration is allowed for input/output devices
*2
and external outputs regardless of the out-of-group I/O fetch setting
*1
. Note, however, that the devices of other CPU
modules and the external outputs controlled by other CPU modules are not turned on or off even if forced on/off is
registered from the host CPU for the external outputs controlled by other CPU modules. Only the devices of the host CPU
module are turned on or off.
*1 For the out-of-group I/O fetch setting, refer to the following.
Page 290 Out-of-group I/O fetch setting
*2 Except when the on/off state of the input/output devices is changed by using the output instruction
Forced on/off registration status of when the registration is
canceled
FUNCTION LED status
No registered on/off information is remaining.
Off
• The forced on/off state registered last is handled as the on/off state of input/output devices.
• Since the on/off state displayed in engineering tools may differ from that of the CPU module, update the on/off state displayed in engineering tools.
When the input device (X0) is used
When the direct input device (DX0) is used
Set X0 by using the SET instruction.
Turn on X0 because the SET instruction is being executed.
Set X0 by using the SET instruction.
Reflect the registered off information.
Turn off X0 although the SET instruction is being executed.
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
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