About I/O Refresh; Allocated Area List - Omron CS1W-MCH71 Operation Manual

Overview
Area Brev-
ity
Custom I/O Area a_A
a_B
a_C
a_D
a_E
a_F
a_G
a_H
Note
7-1-2

About I/O Refresh

When the CPU Unit's
Cycle Time is shorter than
the MC Unit's Unit Cycle
When the CPU Unit's
Cycle Time is longer than
the MC Unit's Unit Cycle
When the CPU Unit's
Cycle Time and the MC
Unit's Unit Cycle are
exactly the same
7-1-3

Allocated Area List

Word Allocation Based on
the Unit Number
Direction Usage
Setting General I/O A
Setting General I/O B
Setting General I/O C
Setting General I/O D
Setting General I/O E
Setting General I/O F
Setting General I/O G
Setting General I/O H
(1) The total number of words (in a normal operation) when No. of motion
tasks = 1, No. of Axes = 1, and without custom area allocations
(2) The total number of words (in a normal operation) when No. of motion
tasks = 8, No. of Axes = 32, and all of general I/O are allocated
CPU and MC Units exchange various data mentioned above (allocated bits,
allocated DM, custom bit area, etc.) with each other asynchronously. There-
fore, the following behaviors may be encountered.
Data will be notified to the MC Unit after the CPU Unit runs for several cycles.
Therefore, it is required to prepare the ladder program to confirm that data
has been notified from the CPU Unit to the MC Unit successfully.
Ex: Turn ON the origin search bit and then confirm that the busy flag of the
axis is turned ON.
Data will be notified to the MC Unit after the CPU Unit runs for 1 cycle.
There is a possibility that none of data is notified to the MC Unit. In this case,
set a longer or shorter Cycle Time for the CPU Unit.
The bit area and the range of respective DM areas are allocated based on the
unit number of the Unit.
Brevity
codes
n CPU Bus Unit allocated bit area
words
m CPU Bus Unit allocated DM
area words
CPU Bus Unit Allocated Bit Area Words
25 words are allocated for each Unit starting from the word 1500.
Unit Number
0 Word 1500-1524
1 Word 1525-1549
2 Word 1550-1574
Remark
General I/O
General I/O
General I/O
General I/O
General I/O
General I/O
General I/O
General I/O
Addresses in the CPU unit
Word 1500 – 1899
n = 1500 + 25 × Unit Number
D30000 – D31599
m = D30000 + 100 × Unit Number
Bit area Unit Number
8
9
10
Section 7-1
No. of No. of
words min. words max.
0 160
0 160
0 160
0 160
0 160
0 160
0 160
0 160
23 (See note 1551 (See
1.) note 2.)
Bit area
Word 1700-1724
Word 1725-1749
Word 1750-1774
375