Hitachi EH-150 Applications Manual page 148

Task code H27
Function
Notifies the CPU that the parameter area data has been modified.
Execution condition
CPU status
STOP RUN
× ×
×
Format
Request
H27
Response
(a) H27
Description
(1) Conducts I/O assignment based on the parameter information stored in parameter area (A) of the user memory so that
the I/O and communication actions are performed according to the new I/O assignment.
(2) When the initialization of all user memory areas, zero clear, change in parameter area (A), or the writing of memory
assignment is performed, always execute this task code when the memory write processing is completed.
(3) If the I/O assignment of each communication module is erased, or if the slots are changed after this task code has been
executed, communication between the CPU and the connected host cannot be performed. In such cases, connect the
programming device to the CPU and perform the necessary operations such as I/O assignment to recover.
Parameter modification completion
HALT ERROR
× ×
READ occupancy
×
WRITE occupancy
(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-23
Appendix B Task Codes Specifications
Classification
Occupancy
status
Memory write