Detailed Information On I/O Table Creation Errors; Data Exchange With Cpu Bus Units; Special I/O Units - Omron SYSMAC CS Series Operation Manual

Detailed Information on I/O Table Creation Errors

8-5

Detailed Information on I/O Table Creation Errors

Name Address
Word Bit
CPU Bus Unit Setup A261 00 ON: Error in CPU Bus Unit Setup
Area Initialization
Error Flag
I/O Overflow Flag
Duplication Error Flag
I/O Bus Error Flag
SYSMAC BUS Recog-
nition Error Flag
Special I/O Unit Error
Flag
I/O Unconfirmed Error
Flag
8-6

Data Exchange with CPU Bus Units

8-6-1

Special I/O Units

Special I/O Unit Area
(I/O Refreshing)
398
Precautions in Setting First Slot Words
When the I/O tables are edited, the CX-Programmer checks for any duplica-
tions in word allocations caused by first word settings. It is conceivable, how-
ever, that duplications in word allocations could occur after the I/O tables have
been registered, e.g., as the result of replacing a 1-word Unit with a 2-word
Unit. In this case the extra word needed by the new Unit would still also be
allocated to the next Unit.
When the PLC is turned ON, the CPU Unit checks the registered I/O tables
against the actual Units mounted to the PLC. If there are any duplications, and
error will occur and it will be no longer possible to edit the I/O tables. If this
happens, the I/O tables will have to be deleted and recreated or retransferred
from a Programming Devices.
With a CS1-H CPU Unit, the contents of A261 provides information on the
Unit causing the error whenever one occurs when creating the I/O tables from
the Programming Console or CX-Programmer. This information will make it
easier to find the Unit causing the problem with troubleshooting I/O tables.
Refer to SECTION 11 Troubleshooting for actual procedures.
Contents
Turns OFF when I/O tables are generated normally.
02 ON: Overflow in maximum number of I/O points.
Turns OFF when I/O tables are generated normally.
03 ON: The same unit number was used more than
once.
Turns OFF when I/O tables are generated normally.
04 ON: I/O bus error
Turns OFF when I/O tables are generated normally.
06 ON: SYSMAC BUS detection ended in an error.
Turns OFF when I/O tables are generated normally.
07 ON: Error in a Special I/O Unit
Turns OFF when I/O tables are generated normally.
09 ON: I/O detection has not been completed.
Turns OFF when I/O tables are generated normally.
This section describes how data can be exchanged between Special I/O Units
or CS-series CPU Bus Units, and the CPU Unit.
Special I/O Units include C200H Special I/O Units and CS-series Special I/O
Units. Data can be exchanged between Special I/O Units and the CPU Unit
through the Special I/O Unit Area, the DM Area, or FINS commands.
Data is exchanged each cycle during I/O refreshing of the Special I/O Unit
Area. Basically, 10 words are allocated to each Special I/O Unit based on its
unit number setting. The number of words actually used by the Special I/O
Unit varies; there are models that require 2 words, 4 words, and 20 words.
Section 8-5
When At Setting
changing startup timing
to RUN
mode
Held Cleared When I/O
tables are
created