AMETEK 1746 LDT Interface Card - Manual (Page 12)

Chapter 3: Set-Up & Programming
Installation & Programming Manual 8
Data Format Bit
The purpose of this bit is to add an option that will allow the customer to display the position val-
ue in a more readable format. By setting bit 7 of the Command Bit Register to one, the position
will be displayed in the following format: The thousandths digits will be displayed in the high
word and the hundredths, tens, and ones digits will be displayed in the low word. See example
below and specifications for position update times.
Example:
Position is 35111 (35.111 inches)
Without the data format option (Command Bit Register, bit 7=0), the position would be dis-
played in the input image table as:
0 ; high word
-30425 ; low word
With the data format option selected (Command Bit Register, bit 7=1), the position would be
displayed in the input image table as:
35 ; high word
111 ; low word
With the new data format option selected, the position can range from 0 to 32767999.
Velocity Bit
The purpose of this bit is to add an option that will allow the customer to turn off the velocity
display. By turning off the velocity feature, the position update time decreases. Velocity is on
when bit 6 of the Command Bit Register is zero (default). The velocity is turned off when bit 6
of the Command Bit Register is one. See specification for position update times.
Filter Enable Bit
This bit will enable/disable the position filter. When this bit is set, the filter is enabled. When this
bit is cleared, it is disabled.