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Calculating with Signed Binary Data Section 1-7
CQM1H Operation Manual. Refer to the CX-Programmer Operation Manual:
C-series PCs for details on using the CX-Programmer.
Input Instructions Only 16-bit operands can be input for the following instructions: NEG(––),
ADB(50), SBB(51), MBS(––), and DBS(––). Refer to the CQM1H Operation
Manual for details on inputting instructions from the Programming Console.
1-7-4 Using Signed-binary Expansion Instructions
The following CQM1H instructions must be allocated function codes in the
instructions table before they can be used.
• 2’S COMPLEMENT – NEG(––)
• DOUBLE 2’S COMPLEMENT – NEGL(––)
• DOUBLE BINARY ADD – ADBL(––)
• DOUBLE BINARY SUBTRACT – SBBL(––)
• SIGNED BINARY MULTIPLY – MBS(––)
• DOUBLE SIGNED BINARY MULTIPLY – MBSL(––)
• SIGNED BINARY DIVIDE – DBS(––)
• DOUBLE SIGNED BINARY DIVIDE – DBSL(––)
Allocating Function
Codes
The procedure to using the Programming Console to allocate function codes
is shown in the CQM1H Operation Manual. Be sure that pin 4 of the CQM1H’s
DIP switch is turned ON to enable use of a user-set instruction table before
performing this operation.
1-7-5 Application Example Using Signed Binary Data
The following programming can be used to performed calculations such as
the following in the CQM1H:
((1234 + (–123)) x 1212 – 12345)
÷ (–1234) = –1081, Remainder of 232
000 = 04D2 ← 1234
001 = FF85
← –123
LR00 = 04BC
← 1212
HR50 = 3039
← 12345
HR51 = 0000
←
DM1000 = FB2E ← –1234
DM1001 = FFFF
←
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