Hitachi EH-150 Applications Manual page 143

Task code H20
Function
Clear the designated area in the user memory.
Execution condition
CPU status
STOP RUN
× ×
×
Format
Request
H20 (a)
Response
(a) H20
Description
(1) The composition of user memory
The user memory has the composition as shown
in the diagram to the right. Parameter area (A)
stores the I/O assignment, memory assignment
and other information, while parameter area (B)
stores the timer information, etc.
(2) Description of each function
1] Initialization of all user memory areas (subcommand H00)
Initializes all of parameter areas (A) and (B), the HI-FLOW area and the HI-LADDER area. If this command is
executed, memory are assigned as follows. Also, the I/O assignment is erased.
Parameter area ((A), (B) total)
HI-FLOW area
HI-LADDER area
*2 : Determine the load capacity from H10 "CPU status 2] user memory capacity".
Clear all
HALT ERROR
× ×
READ occupancy
×
WRITE occupancy
(a) Function selection (subcommand)
1] H00: Initialization of all user memory area
2] H01: Initialization of the HI-FLOW area *1
3] H02: Initialization of the HI-LADDER area
4] H03: Zero clear of all user memory area
*1: EH-150 does not support HI-FLOW.
(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.
Assignment capacity
:
:
: Load capacity *2 – H0280
B-18
Appendix B Task Codes Specifications
Classification
Occupancy
status
User memory
Parameter area (A)
Parameter area
Parameter area (B)
HI-FLOW area
HI-LADDER area
H0280
H0000
Memory write