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2-2
Section
MC Unit Control Modes
17
Tasks are controlled through the following three systems: the CX-Motion, lad-
der-diagram program, and Teaching Box
The MC Unit may be processing commands from all the three systems at the
same time.
CX-Motion
Ladder-diagram program
Teaching Box
MC Unit
Tasks 1 to 4
MC Unit Control Modes
There are three modes used to control the MC Unit from the Teaching Box.
These three control modes are provided to avoid possible problems that may be
caused with commands coming from three different control systems and also to
assure the user’s safety.
•
The MC Unit is initially set to the T.BOX LIMITED mode which allows only mon-
itoring from the Teaching Box.
•
When executing any function other than monitoring, change the control mode
to either T.BOX ENABLED or T.BOX RESERVED.
•
Control modes of the MC Unit can be changed only from the Teaching Box.
Refer to 4-2 Changing the MC Unit Control Mode for information on changing the
control mode.
Control mode
Description
T.BOX LIMITED
Default setting which allows only monitoring from the
Teaching Box.
This mode is automatically returned to when the power supply
to the MC Unit is reset or when the Teaching Box is
disconnected and reconnected.
Normally used for monitoring the current position.
T.BOX ENABLED
Used to execute programs (debugging), teaching, and
perform other operations from the Teaching Box.
When the MC Unit is set for this control mode, only the
following operations are possible from the ladder-diagram
program (cyclic).
Deceleration stop (for interlocking while jogging)
Optional switches (for debugging during program execution)
Resetting M codes (for debugging during program execution)
T.BOX RESERVED
All commands (cyclic) form the ladder-diagram program are
ignored.
This mode is used when performing wiring checks or when
teaching.
When programs are executed in this mode, those functions
that are interfaced with external devices, such as waiting for
M code resets or optional inputs, are ignored.
The only difference between this mode and the T.BOX
ENABLED mode is that in this mode, all commands from the
ladder-diagram program are ignored.
“T.BOX” stands for the Teaching Box and is used in Teaching Box displays.
Note The setting of the Error Counter Selection Bit in the PC Interface Area (word n,
bit 07) made from the ladder program is valid for the CS1W-MC421/221 regard-
less of the operating mode of the Teaching Box.
When the
CS1W-MC221/421 or
CV500-MC221/421 is
Used