Omron CPM1 Programming Manual

327
Special Instructions Section 5-26
5-26-4 MACRO – MCRO(99)
Limitations DM 6144 to DM 6655 cannot be used for O1. The CPM1/CPM1A/SRM1 PCs
support only subroutine numbers 000 through 049.
Description The MACRO instruction allows a single subroutine to replace several subrou-
tines that have identical structure but different operands. There are 4 input
words, IR 096 to IR 099 (IR 232 to IR 235 in the CPM1/CPM1A/SRM1), and 4
output words, IR 196 to IR 199 (IR 236 to IR 239 in CPM1/CPM1A/SRM1
PCs), allocated to MCRO(99). These 8 words are used in the subroutine and
take their contents from I1 to I1+3 and O1 to O1+3 when the subroutine is
executed.
When the execution condition is OFF, MCRO(99) is not executed. When the
execution condition is ON, MCRO(99) copies the contents of I1 to I1+3 to IR
096 to IR 099, copies the contents of O1 to O1+3 to IR 196 to IR 199, and
then calls and executes the subroutine specified in N. When the subroutine is
completed, the contents of IR 196 through IR 199 is then transferred back to
O1 to O1+3 before MCRO(99) is completed.
Note Refer to page 130 for more details on MCRO(99).
Example In this example, the contents of DM 0010 through DM 0013 are copied to IR
096 through IR 099, the contents of DM 0020 through DM 0023 are copied to
IR 196 through IR 199, and subroutine 10 is called and executed. When the
subroutine is completed, the contents of IR 196 to IR 199 are copied back to
DM 0020 to DM 0023.
I1: First input word
IR, SR, AR, DM, HR, TC, LR
Ladder Symbols
Operand Data Areas
O1: First output word
IR, SR, AR, DM, HR, LR
MCRO(99)
N
I1
O1
@MCRO(99)
N
I1
O1
N: Subroutine number
000 to 127
MCRO(99) 10
DM 0010
DM 0020
SBN(92) 10
RET(93)
END(01)
Main program
Subroutine
Main program

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)