Mitsubishi Electric R16MTCPU - Page 279

4 OPERATION CONTROL PROGRAMS
4.19 Other Instructions
277
4
• First I/O No. of the module mounted to the SSCNET/H head module set by [Motion CPU Common Parameter]  [Head
Module] is specified by (S2). (S2) sets 04H by the system configuration when a RFROM instruction is executed in the A/D
conversion module (L60AD4).
• Adjust an executive task, the number of words (n) to be read referring to the operation processing time so that this
instruction may not obstruct the execution of the motion operation because processing time becomes long in argument to
the number of words (n) to be read.
• The following modules can be used.
• Do resetting of the complete bit device by the user program.
• 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.
• 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 SSCNET/H head module word device (Buffer
memory of SSCNET/H head module and intelligent function module). Refer to the following for details.
MELSEC-L SSCNETIII/H Head Module User's Manual
Operation error
An operation error will occur if:
• Number of words (n) to be read is outside the range.
• The target SSCNET/H head module RIO axis No. specified with (S1) is outside the range of 601 to 608.
• 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.
• RFROM instruction was executed again before the RFROM instruction is executed and complete bit device is turned ON.
• RFROM instruction was executed for the RIO axis of the sensing module.
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.
Module Model
Analogue input L60AD4, L60AD4-2GH
Analogue output L60DA4
High-speed counter LD62, LD62D
Power
supply
module
R04CPU R32MTCPU
First
I/O No.
No. : 30H
First
I/O No.
No. : 40H
First
I/O No.
No. : 50H
SSCNET
µ
/H
head module
LX40C6 L60AD4 L60DA4
Power
supply
module
MR-J4(W)-  BMR-J4(W)-  B