Rockwell Automation 57C421B Pulsetach Input Module/DCS 5000/AutoMax - Manual (Page 64)

FĆ4
Appendix F
(Continued)
32ĆBit Register Reference
Use the following method to reference 32 bits as a single register value. One
statement is required in the configuration task for each variable. The symbolic
name of the double integer should be as descriptive as possible:
nnnnn RIODEF SYMBOLIC_NAME![ MSTR_SLOT=m, DROP=d, SLOT=s, REG=r]
When referenced as a double register of 32 bits, register r contains the high
order 16 bits.
A 32Ćbit register reference over remote I/O should be used with care since the
remote I/O system cannot guarantee that the entire 32Ćbit value will moved as a
single operation. For more information refer to the Remote I/O Communications
Module Instruction Manual (JĆ3606).
WARNING
IF YOU USE DOUBLE INTEGER VARIABLES IN THIS INSTANCE, YOU MUST
IMPLEMENT A SOFTWARE HANDSHAKE BETWEEN THE TRANSMITTER AND
THE RECEIVER TO ENSURE THAT BOTH THE LEAST SIGNIFICANT AND MOST
SIGNIFICANT 16 BITS HAVE BEEN TRANSMITTED BEFORE THEY ARE READ BY
THE RECEIVING APPLICATION PROGRAM. FAILURE TO OBSERVE THIS
PRECAUTION COULD RESULT IN BODILY INJURY OR DAMAGE TO EQUIPMENT.
16ĆBit Register Reference
Use the following method to reference 16 bits as a single register value. One
statement is required in the configuration task for each variable. The symbolic
name of the register should be as descriptive as possible:
nnnnn RIODEF SYMBOLIC_NAME%[ MSTR_SLOT=m, DROP=d, SLOT=s, REG=r]
Bit Reference
Use the following method to reference individual bits in a register. One statement
is required in the configuration task for each variable. The symbolic name of the
register should be as descriptive as possible:
nnnnn RIODEF SYMBOLIC_NAME@[MASTER_SLOT=m, DROP=d, SLOT=s, ăăăăăăă&
REG=r, BIT=b]
where:
nnnnn =
BASIC statement number. This number may range from
1Ć32767.
SYMBOLIC_NAME! = A symbolic name chosen by the user and ending with
(!). This indicates a long integer data type and all
references will access registers r and r+1.
SYMBOLIC_NAME% = A symbolic name chosen by the user and ending with
(%). This indicates an integer data type and all
references will access register r".