User manual

Chapter 1 Introduction
10 ADVANCED MICRO CONTROLS INC.
Programmable Parameters (continued)
Number of Turns
The Number of Turns parameter sets the number of turns needed to complete one multi-turn
cycle. The values that can be programmed into this parameter is dependent on the value of the
Transducer Type parameter.
hýWhen using a 100 turn transducer, the number of turns is programmable to 1, 2, 4, 5,
10, 20, 25, 50, or 100.
hýWhen using a 180 turn transducer, the number of turns is programmable to 1, 2, 3, 4,
5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, or 180.
hýWhen using a SAC-RL210-G128, the number of turns is programmable to 1, 2, 4, 8,
16, 32, 64, or 128.
To the 1761H, the HTT-20-1,000 and HTT-20-1,800 transducers appear to be
HTT-20-100 and HTT-20-180 transducers. Therefore, when using the 1,000 or
1,800 transducers, program the Number of Turns using the 100 or 180 turn values
above. The actual Number of Turns that must be completed will be ten times
(10x) the programmed value.
The default value of this parameter is equal to the value of the Transducer Type Parameter.
Changing the Transducer Type parameter resets the Number of Turns to its default value.
Full Scale Count
The Full Scale Count parameter specifies the number of counts over the programmed number
of turns.
AMCI Transducers
hýDefault value is (Number of Turns * 4096) if 100 or 180 turn transducer
hýRange is 2 to (Default Value)
Autotech Transducers
hýDefault value is (Number of Turns * 1024)
hýRange is 2 to (Default Value)
To the 1761H, the HTT-20-1,000 and HTT-20-1,800 transducers appear to be
HTT-20-100 and HTT-20-180 transducers. Therefore, when using the 1,000 or
1,800 transducers, note that the actual Number of Counts per turn is one tenth
(1/10th) the programmed value.
Changing the Transducer Type parameter resets the Full Scale Count to its default value.
Backplane Programming
When a 1761H module is configured to use block transfers, it is programmed using data sent
to it with block transfer writes. All block transfer writes are four words long. The first word of
the block transfer write is called the Command Word. The four least significant bits of this word
define what programming data is being transferred to the module .