Hitachi EH-150 Applications Manual page 137

Task code
Function
Declares that the user memory will be accessed. The user memory cannot be accessed by the host unless the CPU is occupied
using this task code. Also, depending on the function selection, it performs the same processing as the parameter
modification completion processing (task code H27).
Execution condition
Function H01
selection
sub- H02
command
H05
H06
H00
*1: It cannot be executed while the CPU is READ-occupied by another station.
Format
Request
H16 (a)
Response
(a) H16 (b)
H16 CPU occupancy/cancel
CPU status
STOP RUN HALT
× ×
× ×
*1 *1
(a) Function selection (subcommand)
1]
2]
3]
4]
5]
(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.
(b) User program version (H00 to HFF)
Appendix B Task Codes Specifications
ERROR
READ occupancy
× ×
WRITE occupancy
× ×
READ occupancy
WRITE occupancy
READ occupancy
WRITE occupancy
READ occupancy
*1 *1
WRITE occupancy
READ occupancy
WRITE occupancy
H01: READ occupancy
H02: WRITE occupancy
H05: Modifies the local station occupancy mode from WRITE
occupancy to READ occupancy.
H06: Modifies the local station occupancy mode from READ
occupancy to WRITE occupancy.
H00: Cancels the local station occupancy.
B-12
Classification CPU control
Occupancy
status