Appendix
A - 16
Task code
H17
Forced cancel of occupation
Classification
CPU Control
Function
Forces the cancel of CPU occupation. This command is used in situations such as when another programming
device has gone down due to an error while occupying the user memory of the CPU (function selection H00).
When connecting the host to the CPU and occupying it for the first time, use function selection H01 so the local
occupation status is canceled forcibly.
This task code can also be executed when the CPU is not occupied.
Execution condition
CPU Status
Occupation
STOP
RUN
HALT
ERROR
READ occupation
WRITE occupation
Not occupied
Request format
H 1 7
(a)
(a) Function selection (subcommand)
1] H00: Forced cancel of all occupation
2] H01: Forced cancel of local station occupation
Response format
H 1 7
(a)
(a) Response task code (H00 when executed normally)
For task codes other than the normal task codes, refer to the “response list by
task code” at the end of this chapter.
With forced cancel, if there are modification in the parameter area, the same processing as parameter
modification completion processing is performed (refer to the task code H27) as well as the canceling of
memory occupation.
1] Forced cancel of all occupation (subcommand H00)
All occupation is canceled unconditionally, so when this command has been executed the peripheral that is
reading the user memory, for example, will not be able to perform reading. Therefore, verify the registered
peripherals by monitoring the occupation table (WRF040 to WRF04B) when executing this command.
Member registration area
A
B
READ occupied by the
peripherals A, B
All peripheral registrations
are canceled
READ
request
Non executable error
Even if peripheral A or B issues a
READ request, a not-executable
error is sent because the occupancy
is already being forcibly canceled.
2] Forced cancel of local station occupation (subcommand H01)
Cancels the occupation of the local station.
The occupation of other stations are maintained.
A
B
C
A
C
The occupancy by the local
seation (B) is forcibly canceled.
Member registration area
READ occupied by the
peripherals A, B
Summary of Contents for EH-150 Series
Page 2: ......
Page 10: ...M E M O ...
Page 30: ...Chapter 4 Installation 4 10 M E M O ...
Page 156: ...Chapter 7 System setup 7 12 M E M O ...
Page 164: ...Chapter 8 Daily and Periodic Inspection 8 8 M E M O ...
