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1-5
Section
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Caution
Before using a CPM1A program containing one or more of the instructions in the
table above, check the program to be sure that it will operate properly and edit
the program if necessary. The CPM2C may not operate properly if a CPM1A pro-
gram with these instructions is transferred and executed unchanged.
The following three instructions are allocated function codes that were not used
in the CPM1A.
Instruction
CPM2C
CPM1A
RXD(47)
RECEIVE
Not allocated. (NOP(00))
TXD(48)
TRANSMIT
(
(
))
SCL(66)
SCALING
Differences in I/O Memory
The following table shows differences in the SR area. (PV is the abbreviation for
present value.)
Function
CPM2C
CPM1A
Pulse output 0 PV
SR 228 to SR 229
Not
d
Pulse output 1 PV
SR 230 to SR 231
supported.
Pulse output 0 PV Reset Bit
SR 25204
Pulse output 1 PV Reset Bit
SR 25205
RS-232C Port Reset Bit
SR 25209
Battery Error Flag
SR 25308
Changing RS-232C Port Setup Flag
SR 25312
The following table shows differences in the AR area.
Function
CPM2C
CPM1A
Clock/calendar data
AR 17 to AR 21
Not
d
RS-232C Communications Error Code
AR 0800 to AR 0803
supported.
RS-232C Error Flag
AR 0804
RS-232C Transmission Enabled Flag
AR 0805
RS-232C Reception Completed Flag
AR 0806
RS-232C Reception Overflow Flag
AR 0807
Peripheral Port Reception Completed Flag
AR 0814
Peripheral Port Reception Overflow Flag
AR 0815
RS-232C Reception Counter
AR 09
High-speed Counter Comparison Flag
AR 1108
High-speed Counter Overflow/Underflow Flag
AR 1109
Pulse Output 0 Output Condition
AR 1111
Pulse Output 0 PV Overflow/Underflow Flag
AR 1112
Pulse Output 0 Pulse Quantity Set Flag
AR 1113
Pulse Output 0 Output Completed Flag
AR 1114
Pulse Output 1 PV Overflow/Underflow Flag
AR 1212
Pulse Output 1 Pulse Quantity Set Flag
AR 1213
Pulse Output 1 Output Completed Flag
AR 1214
Pulse Output 1 Output Status
AR 1215
Power OFF Counter
AR 23 (See note.)
AR 10
Note CPM1A programs that use AR 10 (the Power OFF Counter) cannot be used in
the CPM2C without editing the program. In the CPM2C, the Power OFF Counter
is in AR 23.
Added Function Code
Allocations
SR Area Differences
AR Area Differences
Summary of Contents for CPM2C
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