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3.6
Cautions on Programming (Operation Errors)
Operation errors are returned in the following cases when executing basic instructions and application instructions with CPU
module:
• An error listed on the explanatory page for the individual instruction occurred.
• When an intelligent function module device is used, no intelligent function module is installed at the specified I/O number
position.
• When an intelligent function module device is used, the specified buffer memory address does not exist.
• The relevant network does not exist when using a link device.
• When a link device is used, no network module is installed at the specified I/O number position.
• When a multiple CPU shared device is used, a CPU module is not installed at the head I/O number position of the specified
CPU module.
• When a multiple CPU shared device is used, the specified shared memory address does not exist.
• The setting of the device number crosses over the boundary between the internal user device and the extended data
register (D) or extended link register (W). (Universal model QCPU (excluding Q00UJCPU) and LCPU)
If data is read from or written to a file register when no file register file is set in parameter or the file register file
set in parameter is not found, the following occurs.
• For the High Performance model QCPU, Process CPU, and Redundant CPU
An error does not occur even when writing/reading to/from file register is performed. However, "0H" is stored
when reading from file register is performed.
• For the Universal model QCPU and LCPU
The OPERATION ERROR (error code: 4101) occurs when writing/reading to/from file register is performed.
Note that the device range check can be disabled using the PLC Parameter so that an error will not be
detected. (Page 111 Device range check)
3 CONFIGURATION OF INSTRUCTIONS
110
3.6 Cautions on Programming (Operation Errors)
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