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18
CPM2C-S Structure and Operation
Section 1-3
standard communications settings or the communications settings in the PC
Setup.
1-3-2
Operating Modes
CPM2C-S CPU Units have 3 operating modes: PROGRAM, MONITOR, and
RUN.
PROGRAM Mode
The program cannot be executed in PROGRAM mode. This mode is used to
perform the following operations in preparation for program execution.
• Changing initial/operating parameters such as those in the PC Setup
• Writing, transferring, or checking the program
• Checking wiring by force-setting and force-resetting I/O bits
!Caution
The PC continues to refresh I/O bits even if the PC is in PROGRAM mode, so
devices connected to output points may operate unexpectedly if the corre-
sponding output bit is turned ON by transferring I/O memory or force-setting
output bits from a Programming Device.
When output bits are allocated to the DeviceNet I/O Link Write Area, data writ-
ten to the output bits through DeviceNet is effective immediately and the out-
put bits may go ON even if the PC is in PROGRAM mode. Do not change the
status of output bits from a Programming Device or DeviceNet unless it is safe
to do so.
MONITOR Mode
The program is executed in MONITOR mode and the following operations can
be performed from a Programming Device. In general, MONITOR mode is
used to debug the program, test operation, and make adjustments.
• Online editing
• Monitoring I/O memory during operation
• Force-setting/force-resetting I/O bits, changing set values, and changing
present values during operation
RUN Mode
The program is executed at normal speed in RUN mode. Operations such as
online editing, force-setting/force-resetting I/O bits, and changing set values/
present values cannot be performed in RUN mode, but the status of I/O bits
can be monitored.
1-3-3
Operating Mode at Startup
The operating mode of the CPM2C-S when the power is turned ON depends
upon the setting of pin 4 on the DIP switch on the front of the CPM2C-S, the
PC Setup settings in DM 6600, and the Programming Console’s mode switch
setting if a Programming Console is connected.
PC Setup setting
Operating mode
Word
Bits
Setting
DM 6600
08 to 15
00 (Hex)
See note 1.
01 (Hex)
Startup mode is the same as the operating mode
before power was interrupted.
02 (Hex)
Startup mode is determined by bits 00 to 07.
00 to 07
00 (Hex)
PROGRAM mode
01 (Hex)
MONITOR mode
02 (Hex)
RUN mode
Содержание CPM2C-S100C
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