Conversion Instructions - Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual

Conversion Instructions

Limitations
Description
Precautions
Flags
7-20 Conversion Instructions
7-20-1 BCD-TO-BINARY – BIN(23)
Limitations
Description
This instruction is available in the CPM2A/CPM2C only.
The 8-digit value in LL+1,LL must be less than or equal to UL+1,UL.
When the execution condition is OFF, ZCPL(––) is not executed. When the
execution condition is ON, ZCPL(––) compares the 8-digit value in CD, CD+1 to
the range defined by lower limit LL+1,LL and upper limit UL+1,UL and outputs
the result to the GR, EQ, and LE flags in the SR area. The resulting flag status is
shown in the following table.
Comparison result p
CD , CD+1< LL+1,LL
LL+1,LL CD, CD+1
UL+1,UL < CD, CD+1
Placing other instructions between ZCPL(––) and the operation which accesses
the EQ, LE, and GR flags may change the status of these flags. Be sure to ac-
cess them before the desired status is changed.
Indirectly addressed DM word is non-existent. (Content of *DM word is
ER:
not BCD, or the DM area boundary has been exceeded.)
LL+1,LL is greater than UL+1,UL.
EQ: ON if LL+1,LL
LE: ON if CD, CD+1 < LL+1,LL.
GR: ON if CD, CD+1 > UL+1,UL.
Ladder Symbols
BIN(23) @BIN(23)
S
R
DM 6144 to DM 6655 cannot be used for R.
When the execution condition is OFF, BIN(23) is not executed. When the execu-
tion condition is ON, BIN(23) converts the BCD content of S into the numerically
equivalent binary bits, and outputs the binary value to R. Only the content of R is
changed; the content of S is left unchanged.
BIN(23) can be used to convert BCD to binary so that displays on the Program-
ming Console or any other programming device will appear in hexadecimal rath-
er than decimal. It can also be used to convert to binary to perform binary arith-
metic operations rather than BCD arithmetic operations, e.g., when BCD and
binary values must be added.
GR
(SR 25505)
0
UL+1,UL 0
1
CD, CD+1 UL+1,UL
S
R
S
BCD
R
Binary
Section
Flag status
EQ LE
(SR 25506) (SR 25507)
0 1
1 0
0 0
Operand Data Areas
S: Source word (BCD)
IR, SR, AR, DM, HR, TC, LR
R: Result word
IR, SR, AR, DM, HR, LR
7-20
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