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3. CONVERSION RULES FOR THE PROGRAM CONVERSION FUNCTION
3.
CONVERSION RULES FOR THE PROGRAM CONVER-
SION FUNCTION
This chapter describes program conversion rules.
3.1
Precautions When Converting Programs
After executing the F-to-FX program conversion function, check and edit the following points.
For information on how to operate programming tools, refer to the manual for the relevant tool.
For information on device range and instructions, refer to the manual for the relevant tool.
(1) Changing the device number
The device converted using the program conversion function is within the device range of FX
and FX
programmable controllers
2
conversion depending on the model. Check the device range of the model with the conversion
rule (refer to Section 3.2), and change the device number.
Some special devices (special auxiliary relay (M)) are converted to temporary devices due to
differences in functions. Use GX Works2, a supported programming software for the FX3
series, to change converted programs to those used for functions and instructions supported
by FX3 series programmable controllers.
(2) Changing programs
Some instructions cannot be converted due to differences in functions. (Refer to Sections 3.3
and 3.4.) Change unconvertible instructions to programs used for functions and instructions
supported by FX3 series programmable controllers after the conversion.
Even if the instructions can be converted, CJP 777 and EJP 777 jump instructions and those
containing structures that do not follow the rules are converted to NOP, so change them to pro-
grams used for functions and instructions supported by FX3 series programmable controllers.
(3) Checking programs as a whole
Check programs for errors. If there is an error, change the program accordingly.
(4) Checking program operation
The program operation cycle is changed, so write the program to the programmable controller
and check the system operation as a whole. Modify the program as necessary.
*1 The GX Works2 programming software is recommended to edit programs. It is compatible
with the FX3 series, and device replacement and other functions can be performed easily.
*2 These products have been discontinued. For information on the production discontinuation
period of programmable controllers, refer to Appendix 1.
*2
, so the device may need to be changed (replaced) after
1
2
3
*1
A1
1
A2
A3
23
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