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Main > Product Type > Automation Systems > PLCs

This may be caused by some kind of error in I/O addressing as follows:

Two or more Special I/O Units are set to the same unit number or two or more Group-2 High-density I/O Units are set to the same I/O number or I/O word.
Perform an I/O Table Read operation to check unit numbers, and eliminate duplications. (High-density I/O Units other than Group-2 are Special I/O Units, too.)
The I/O number of a 64-pt Group-2 High-density I/O Unit is set to 9.
Set unit numbers of 64-pt Group-2 High-density I/O Units to numbers other than 9.
Two SYSMAC NET Link or SYSMAC LINK Units share the same operating level.
Check the SYSMAC NET Link and SYSMAC LINK Unit operating levels and eliminate duplications.

Can C200H Group-2 High-Density I/O Units Be Used With C200H-RT201 SYSMAC BUS Remote I/O Slave Unit? No, C200H Group-2 High-density I/O Units cannot be mounted to a Slave Rack created with the C200H-RT201. Use 16-point I/O Units instead.	Is There A Restriction On The Number Of C200H PLCs SYSMAC LINK Units That Can Be Mounted When A Host Link Unit Is Also Mounted? Is It Different Than With C1000H PLCs? With C200H, the SYSMAC LINK Units use the Bus Connection Units to exchange data with the CPU Unit. Therefore, there is no restriction on the number that can be mounted...	What Part Of I/O Memory In The CPU Unit Is Allocated To CS1W-SCU21 Serial Communications Unit And CS1W-CLK21 Controller Link Unit? CS1W-SCU21 and CS1W-CLK21 are both CPU Bus Units. Words are allocated to CPU Bus Units according to the unit numbers set on the front of the Units. The first Word...

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