Rockwell Automation 61C516 AutoMax/AutoMate 24VAC/DC Input Module - Manual (Page 17)

4Ć3
4.2.2.3 Control Block Task Example
2400
COMMON STARTPB@ \!Start pushĆbutton
2500 LOCAL MOMENTARY@ \!Momentary output
3000 !
5000 CALL TRANSITION( INPUT=STARTPB@,
OUTPUT=MOMENTARY@)
5500 !
6000 END
The symbolic name STARTPB@ references the input module. The
symbolic name MOMENTARY@ is local to the control block task and
does not have I/O associated with it. Refer to the Control Block
Language Instruction Manual (JĆ3676) for more information.
4.2.3 Restrictions on Use in DCS 5000/AutoMax
Systems
This section describes limitations and restrictions on the use of this
module in DCS5000/AutoMax systems.
The 24V AC/DC Input module is a read only module. Attempts to
write to it will cause a bus error (severe system error). The following
are examples from programs that write to the module and should
therefore be avoided:
a. Referencing the module from a coil in a ladder logic task.
b. Referencing the module on the left side of an equal sign in a LET
statement in a control block or BASIC task.
c. Referencing the module as an output in a control block function.
4.3 Use In AutoMate Systems
In AutoMate systems, the 24V AC/DC Input module is accessed using
the MOVMR instruction block. This block reads the data from the
module and places it into a destination register, which, depending
upon the register chosen, can then be accessed as a register or as a
register and as individual bits. Note that the module cannot be used
in a remote rack in AutoMate systems.
Register 3765 in an AutoMate 30 Processor and register 17565 in an
AutoMate 40 Processor indicate whether there is a missing or
improperly seated module in the rack. The slots in the rack
correspond to the bits in the register, which are set to 1 (on) when a
module is missing or seated improperly. A set bit in either register
3765 or 17565 will not, however, affect the execution of the
application program.