Command 4: upper and lower limits – AMETEK 1746 LDT Interface Card User Manual
Page 15
11
Installation & Programming Manual
Chapter 3: Set-Up & Programming
Parameter 1 will specify whether the new position is for LDT 1 or 2.
Parameters 2 and 3 contain the new position that the LDT is to reset its position to. When this
command is received, the home position will be checked for what is valid.
The default value is no offset. A save configuration command will save this offset to EEPROM.
NOTE: The EEPROM on the 1746L is only guaranteed to 10,000 write cycles. Because of this
it is recommended that this command be used sparingly.
Command 4: Upper and Lower Limits
This command programs the upper and lower limits for the specified LDT. The parameters for
this command are defined below:
Parameter 1 contains the LDT number that the lower and upper limits are assigned to. This is
either a 1 or 2.
Parameters 2 and 3 contain the lower limit value. These are inch values to the thousandth of an
inch, or mm to hundredth of a millimeter.
Parameters 4 and 5 contain the upper limit value. These are inch values to the thousandth of an
inch, or mm to hundredth of a millimeter.
Example: If the lower limit is set at 10 inches, the lower limit value would be 0 for the high
word and 10000 for the low word.
The upper and lower limits must be greater than or equal to zero and the upper limit must be
greater than the lower limit. The default value for the lower limit is zero and the default value
for the upper limit is 180 inches.
Output Image Table
Description
Word 0
Bit Register
Word 1
Command Register (3)
Word 2
Parameter 1 LDT Number
Word 3
Parameter 2 Home Position (high word)
Word 4
Parameter 3 Home Position (low word)
Word 5
Parameter 4 Reserved
Word 6
Parameter 5 Reserved
Word 7
Parameter 6 Reserved
Output Image Table
Description
Word 0
Bit Register
Word 1
Command Register (4)
Word 2
Parameter 1 LDT Number
Word 3
Parameter 2 Lower Limit (high word)
Word 4
Parameter 3 Lower Limit (low word)
Word 5
Parameter 4 Upper Limit (high word)
Word 6
Parameter 5 Upper Limit (low word)
Word 7
Parameter 6 Reserved