4 - 39
CPU MODULE4.
(Continued)
*1 "n" is determined by the installation location of the master modules.
*2 When the total number of remote I/O station is odd, add 1 to the station number to obtain the
occupied storage devices.
I/O signal
from the
master
module
Buffer memory
address of the
master module
Item Setting range Description
Y(n+1A)
*1
–
FROM/TO
response
specification
Link priority, CPU priority
Priority selection of
access to the master
module buffer memory
(1) Link priority ..... Link access by MINI-S3 has the priority.
During the link access, FROM/TO is caused to wait.
• Possible to read out the received data refreshed at the
same timing.
• The maximum wait time (0.3ms + 0.2ms number of
separate refresh stations) for the FROM/TO instruction
may be generated.
(2) CPU priority ......
Even during the link access, it interrupts and
accesses.
• Depending on the timing, received data in the midst of
I/O refresh may be read.
• No wait time for FROM/TO instruction.
Y(n+1B)
*1
–
Data clear
specification
for
communication
faulty station
Retention, clear (received
data)
• Retention ......
• Clear ...... Sets all points to OFF.
–
100 to 103
195
Faulty station
detection
M, L, B, T, C, D, W, R,
none (Bit device: multiples
of 16)
• Sets the head device to store the faulty stations
detected data.
• MINI ...... occupies 4 words; MINI-S3: occupies 5 words.
–
107
196 to 209
Error No. T, C, D, W, R
• Sets the head device to store the error code at the error
occurrence.
• MINI ...... occupies 1 word; MINI-S3 ...... occupies (1+
number of remote terminal units) words.
–
4
Line error
check setting
(Line error)
• Test message sending
• OFF data sending
• Immediate data
transmission before line
errors
• Sets data sending method for verification of faulty area
when the line errors occur.
Access by FROM/TO instruction of
CPU has the priority.
Retains the received data for batch
and separate refresh.
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