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Datasheet of C200H-DSC01 - DATA SETTING CONSOLE
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4-1
Memory Allocation
Memory Allocation
According to the Unit number switch setting on the front of the C200H Heat/Cool
Temperature Control Unit, 10 words are allocated for each Unit number in the
Special I/O Unit IR area between IR100 to IR199, which is used as the I/O
refresh data area. The IR area used by the C200H Temperature Control Unit is
refreshed on each C200H PC I/O refresh cycle.
IR150 to IR159
IR area
Unit#0 IR100 to IR109
Unit#1 IR110 to IR119
Unit#2 IR120 to IR129
Unit#3 IR130 to IR139
Unit#4 IR140 to IR149
Unit#5
Unit#6 IR160 to IR169
Unit#7 IR170 to IR179
Unit#8 IR180 to IR189
Unit#9 IR190 to IR199
During the PC’s I/O refresh,
each cycle is executed for
the outputs (PC to Heat/Cool
Temperature Control Unit)
followed by the inputs (Heat/
Cool Temperature Control
Unit to PC).
Heat/Cool Temperature Control Unit
I/O refresh data area
Wd (n)
to
Wd (n+2)
Output
refresh
Wd (n+3)
to
Wd (n+9)
Input
refresh
(n=100 + 10 x Unit number)
The terms “output” and
“input” are defined from
the C200H PC side.
C200H PC
OUT
IN
Note A Duplicate I/O Unit error occurs if the set Unit number corresponds to the num-
ber of an existing Special I/O Unit.
Selecting Allocated Data
The data allocated to each IR word due to the Unit number setting is determined
by the setting of SW2-1 on the front of the Unit.
ON
Normal
All data can be set using commands.
OFF
Fixed
Parameters are fixed for the set point (SP).
This setting becomes valid immediately when the switch is set.
Memory Allocation
Section 4-1
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