Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
Conversion Instructions 209
Updates to Math Status Bits
Changes to the Math Register
Contains the 5-digit BCD result of the conversion. This result is valid at
overflow.
Example
The integer value 9760 stored at N7:3 is converted to BCD and the BCD
equivalent is stored in N7:0. The maximum BCD value is 9999.
Math Status Bits
With this Bit: The Controller:
S:0/0 Carry always resets
S:0/1 Overflow sets if BCD result is larger than 9999. On overflow, the minor
error flag is also set.
S:0/2 Zero Bit sets if result is zero, otherwise resets
S:0/3 Sign Bit sets if the source word is negative; otherwise resets
TIP
To convert numbers larger than 9999 decimal, the
destination must be the Math Register (S:13). You must
reset the Minor Error Bit (S:5/0) to prevent an error.
TOD
To BCD
Source N7:3
9760<
Dest N10:0
9760<
TOD
9760N7:3 Decimal 0010 0110 0010 0000
9760N7:0 4-digit BCD1001 0111 0110 0000
MSB
LSB
The destination value is
displayed in BCD format.
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix