Omron CJ - INSTRUCTIONS

1049
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Other Instructions
3
FRMCV
• The FRMCV(284) instruction can be used to convert a CV-series program with the following two
kinds of programming for use in a CS/CJ-series PLC. See the Examples later in this section for an
example.
1. When using indirect binary mode DM addressing (*DM)
(when indirectly specifying a data area address with a PLC memory address in DM)
2. When using CV-series PLC memory addresses directly as values
(when storing PLC memory addresses in Index Registers with direct addressing using an
instruction such as MOV(021))
Example Programming
z Example 1: Converting a CV-series Program with *DM Indirect Binary Mode DM
Addressing
In this FRMCV(284) example, a DM word is specified in S, the PLC memory address there is stored in
an Index Register, and the Index Register is used for indirectly addressed.
0200 Hex
#1234
#1234
0.00
MOV
#1234
S
D
0200 Hex
0.00
FRMCV
D0
IR0
S
D
MOV
#1234
,IR0
S
D
0200 Hex
OC0200 Hex
#1234
#1234
000OC0200 Hex
0200 Hex
OC0200 Hex
PLC Setup
Indirect DM data:
When indirect DM addresses are in binary, the content of
the DM word is treated as a PLC memory address and
specifies the corresponding address in I/O memory.
• CV-series program
(Program using indirect DM
binary mode addressing)
• CS/CJ-series program
Equivalent program
In this case, the value in D0 is 0200 hex. The
corresponding data area address is CIO 512, so
#1234 is transferred to CIO 512.
Word address:
D0
Word address:
CIO 512
MOV(021)
CS/CJ-series PLC
memory address
CS/CJ-series PLC
memory address
In this case, the value in D0 is 0200 hex. The
corresponding CV-series data area address is CIO 512.
The CS/CJ-series PLC memory address for CIO 512 is
0C200 hex, so this value is stored in IR0. The destination
operand in MOV(021) indirectly addresses the content of
IR0, so #1234 is transferred to CIO 512.
MOV(021
)
FRMCV
(284)
CS/CJ-series word
address: D0
CV-series PLC
memory address:
CV-series word
address: CIO 512
CS/CJ-series word
address: CIO 512
Equivalent
CS/CJ-series word
address: IR0
CS/CJ-series word
address: CIO 512
CS/CJ-series PLC
memory address:
CS/CJ-series PLC
memory address:
MOV(021)