Hitachi EH-150 - Task Code HA4 Monitoring with I;O Number Designation (N Random Points)

Appendix B Task Codes Specifications
Task code HA4 Monitoring with I/O number designation
(N random points)
Classification I/O control
Function
Reads the monitor data by designating N random points (words) of I/O numbers.
* This task code can also be executed when the CPU is not occupied.
* The I/O data of EH-150 outside the range returns all off (0).
Execution condition
CPU status
STOP RUN HALT ERROR
{ { { { READ occupancy Occupancy
{ { { { WRITE occupancy status
{ { { { Not occupied
Format
Request
HA4 (a) (b) (c) (b) (c)
1st point (word) Nth point (word)
(a) Number of bits/number of words H01 to H3F (1 to 60)
(b) I/O code
(c) I/O number
Refer to the task code H40.
Response
(a) HA4
Monitor data (1st point, 1st word)
(b) (b)
Monitor data (Nth point, Nth word)
(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) Monitor data (refer to below for details)
(Bit data)
000
1 point
"0" or "1"
(Word data)
1 word
H0000 to HFFFF
B-42