User manual

Chapter 4 Single Transfer Format
24 ADVANCED MICRO CONTROLS INC.
Single Transfer Output Format
When using a 1761H module in Single Transfer Mode, the processor is writing to the
module’s output table at the address assigned to the slot. The format of the data is binary. The
setting of J3-2 (Binary/BCD data jumper) has no effect. Number of Turns and Full Scale Count
parameters are fixed. Figure 4.2 shows the format of Output Word 0.
Output Word 0
Hex
RESERVED BITS: SET TO ZERO
Word
Octal
13 12
15 14 13 12 11 09 08 07 06 05 04 03 02 0110
16 15 14 11 10 07 06 05 04 03 02 01 00
00
17
YDPZ
Figure 4.2 Single Transfer Output Format
Programming Bits
Z
-
Autozero, Bit 00
- When this bit is set, the module will zero the position of the transducer.
P
-
Program Parameters, Bit 01 -
When this bit makes a 0
p
1 transition, the module programs
itself with the state of bits 02 and 03. These parameters are the Count Direction and
Transducer Type of the transducer.
D
-
Count Direction, Bit 02 -
This bit is only acted on when the Program Parameter Bit (01) is
set. This bit programs the state of the Count Direction parameter. When this bit is reset, the
Count Direction is set to its Positive value. When this bit is set, the parameter is set to its
Negative value.
Y
-
Transducer Type, Bit 03 -
This bit is only acted on when the Program Parameter Bit (01)
is set. This bit programs the state of the Transducer Type parameter. When this bit is reset,
the Transducer Type bit is reset to AMCI transducers. When this bit is set, the parameter is
set to Autotech transducers.