User manual

Chapter 6 Block Transfer Programming
56
ADVANCED MICRO CONTROLS INC.
Auxiliary Commands Data
When the Auxiliary Commands bit, (bit 10) of the Command Word is set, the 2762-17 uses
bits 0 through 6 of the Command Word as data. Auxiliary Commands include clearing errors,
enabling or disabling keyboard programming and defining the data transmitted to the processor
with block transfer reads. Format of the block transfer read data is defined starting on page 58.
Words 1 through 11 are not used but must be transmitted. These words should be
considered reserved for future use and must be set to zero. The data format for Auxiliary
Commands is show in figure 6.4
Programming Bit Values
RBC:
Read Back Channel Bit. The 2762-17 has the ability to send its programmed values
back to the PLC. Set this bit to 0 to read back the parameters of channel one or set to
1 to read back the parameters of channel two.
ClrErr:
Clear Errors Bit. Set to 1 to clear module and programming errors. These include:
!
Transducer Faults
!
All Programming Errors
Note that the NvRAM error must be cleared from the keyboard.
DisKB:
Disable Keyboard Bit. Set this bit to 1 to disable all programming from the 2762-17
keyboard. Parameters can be monitored from the keyboard but they cannot be
changed. This bit does not have to be set continuously to disable keyboard
programming. The status of the keyboard is retained by the 2762-17 when power is
removed. Therefore, the only way to enable the keyboard once the Disable Keyboard
Command is accepted is with an Enable Keyboard command.
EnKB:
Enable Keyboard Bit. Set this bit to 1 to counteract a previous Disable Keyboard
command.
RSP:
Read Status and Position Bit. Set this bit to 1 to read back module status with position
and tachometer data of both transducers.
RTS:
Read Transducer Setup Bit. Set this bit to 1 to read back Transducer Setup data of the
transducer specified by the RBC bit (bit 00).
RPS:
Read Positioning Setup Bit. Set this bit to 1 to read back Positioning Setup data of the
transducer specified by the RBC bit (bit 00).
15 14 13 12 10 09 08 07 06 05 04 03 02 01 0011
Additional Commands
00000010
RBC
Word 0
0
ClrErr
DisKB
EnKB
RSP
RTS
RPS
Words 1-11 RESERVED: Must equal zero.
Fig 6.4 Auxiliary Commands Data Format