AMCI 7500 Series Краткое руководство по эксплуатации - Страница 6
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S
7500 I
ERIES
NTELLIGENT
Programming from the Processor
Use the eight Output Words assigned to the 7551 to control the module from the backplane. With these words
you can:
•
Clear an EEPROM Memory Error
•
Change the programmable parameters listed on page 4.
•
Preset the position count.
The format of the 8 Output Words is shown below. To program the module, write the new values into the correct
registers, set the proper bits in Output Word 0, and set the Transmit bit (TRMT) to 1. The 7551 accepts new
parameters only on a 0Ž1 transition of the TRMT bit. LDT Gradient, Full Scale Count and Preset Value are
transferred in two words. The first word of data contains the upper one, two or three digits of the value, the second
word contains the bottom three digits of the value. For example, let the Full Scale Count equal 39,370. The first
word of position data contains the binary number 39, and the second word contains the binary number 370. If the
Preset Value is negative, set the Preset Sign bit (Word 6, Bit 15) and transfer the magnitude of the value in the
digits.
Word 0
Word 1
Word 2
Word 3
Word 4
Word 5
Word 6
Word 7
Word 0:
Bit 0: PRESET LDT - Set the position count to the Preset Value.
Bit 1: LDT Setup - Set this bit to '1' to program the LDT Type (Bit 2), Connection Type (Bit 3), Measure-
ment Unit (Bit 4) and LDT Gradient (Words 1 and 2). When set to '0', Bits 2,3,4 and LDT Gradient
are not read.
6
LDT I
NTERFACE
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0
0
0 0
0
0 0 0 0
0 0 0 0
0 0 0 0 0 0
Lower 3 digits: LDT Gradient
0 0
Full Scale Length
0 0 0 0 0 0
0
0 0 0 0 0 0
Lower 3 digits: Full Scale Count
Upper 3 digits: Position Preset
0 0 0 0 0
0
0 0 0 0 0
Lower 3 digits: Position Preset
M
ODULE
Upper 1 or 2 digits:
LDT Gradient
Upper 3 digits:
Full Scale Count
ADV ANC ED
MIC RO CON T RO L S INC.