Watson Industries, Inc.
SPS-P230 Rev A 10/17/2017
20
The Third digit represents the current time constant as a power of two:
TC = 2
X
Seconds
The nominal time constant is 64 seconds which would display the octal value of X as “6”.
Third
Digit
Time Constant
(seconds)
7
128
6
64
5
32
4
16
3
8
2
4
1
2
0
1
Flag Bits 1:
The flag bits present warning information. The first digit is made from three bits:
1) Pan angle negative stop limit equals a value of 1 when the Pan potentiometer reaches a
preset limit.
2) Pan angle positive stop limit equals a value of 2 when the Pan potentiometer reaches a
preset limit.
3) Pan axis active bit equals a value of 4 when the Pan axis is active.
First
Digit
Pan Axis
Active
Pan Angle Positive
Stop Limit
Pan Angle Negative
Stop Limit
6
Yes
Yes
No
4 + 2
5
Yes
No
Yes
4 + 1
“4” Pan Axis Active
4
Yes
No
No
4
“2” Pan Positive Stop Limit
2
No
Yes
No
2
“1” Pan Negative Stop Limit
1
No
No
Yes
1
The second digit is made from three bits as follows:
1) Tilt angle negative stop limit equals a value of 1 when the Tilt potentiometer reaches a
preset limit.
2) Tilt angle positive stop limit equals a value of 2 when the Tilt potentiometer reaches a
preset limit.
3) Tilt Axis active bit equals a value of 4 when the Tilt axis is active.
First
Digit
Tilt Axis
Active
Tilt Angle Positive
Stop Limit
Tilt Angle Negative
Stop Limit
6
Yes
Yes
No
4 + 2
5
Yes
No
Yes
4 + 1
“4” Tilt Axis Active
4
Yes
No
No
4
“2” Tilt Positive Stop Limit
2
No
Yes
No
2
“1” Tilt Negative Stop Limit
1
No
No
Yes
1