
5.CONVERSION RULES B-64214EN/01
- 24 -
Difference of handling references
On PMC-SB7, address is main constituent of ladder programming.
Address is specified in LADDER to access reference. Symbol and
comment data is defined to the address if necessary. These are
omissible.
Each addressed reference has the following attributes.
• Address
• Data type (Bit, except bit)
• Symbol (option, Max. 16 char)
• Relay comment (option, Max. 16 char)
• Coil comment (option, Max. 30 char)
On PMC-SD7, variable must be made first to access reference address.
Variable is specified by its name in LD and IL to access the reference.
Data type and address are specified in attribute of the variable.
Each variable has the following attributes.
• Variable name (Max. 32 char)
• Data type (BOOL, BYTE, WORD, DWORD, SINT,
USINT, INT, UINT, DINT, and UDINT)
• Array dimension
• Reference address
• Description (option, Max. 255 char)
Conversion rule
Correspondence of source and destination of conversion is as follows.
source of conversion destination of conversion
Address
(PMC-SB7 reference)
→ Address
(PMC-SD7 reference)
Symbol → Name
Relay comment → Not used
Coil comment → Description
Data type
(Note)
→ Data type
Please note that any variable for L (label) and P (Subprogram number)
address is not made by the conversion tool because specific data area
is prepared on PMC-SD7 for these purpose and reference address is
not necessary.
NOTE
Data type is not explicitly defined for the symbol in
PMC-SB7 but distinguished by the address type.