Mitsubishi Electric Melsec Q Series Programming Manual page 345

5 OPERATION CONTROL PROGRAMS
[Errors]
(4) The following modules can be used.
• Analogue input (L60AD4, L60AD4-2GH)
• Analogue output (L60DA4)
• High-speed counter (LD62, LD62D)
(5) Do resetting of the complete bit device by the user program.
(6) Another RFROM instruction cannot be processed until RFROM instruction is
executed and a complete bit device is turned ON. When RFROM instruction is
executed again, before RFROM instruction is executed and complete bit device is
turned ON, the RFROM instruction executed later becomes an error.
(7) To read 5 words or more of data from the SSCNET /H head module, 4 words of
read data are read each time and then repeated. This means that data specified
with 5 words or more is not read at the same timing. For data that needs to be
read at the same timing use the refresh of the cyclic transmission of the
SSCNETIII/H head module word device (Buffer memory of SSCNET /H head
module and intelligent function module).
Refer to the manual of SSCNET /H head module for details.
(1) An operation error will occur if:
• Number of words (n) to be read is outside the range of 1 to 240.
• The target SSCNET /H head module axis number specified with (S1) is
outside the range of 1 to 8.
• The target SSCNET /H head module is not connected at instruction execution.
• Start device No. (D) which stores the reading data + number of words (n) to be
read is outside the device range.
• (D) is a bit device and device number is not a multiple of 16.
• PX/PY is set in (D) to (D)+(n-1).
• RFROM instruction was executed again before the RFROM instruction is
executed and complete bit device is turned ON.
(2) Abnormal completion (D1+1) of complete device turns ON if:
• Abnormalities of the target SSCNET /H head module were detected at the
instruction execution.
• First I/O No. of the intelligent function module specified with (S2) differ from the
intelligent function module.
• The first address of the buffer memory of the intelligent function module
specified with (S3) is outside the buffer memory range.
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