AMCI 7551 Panduan Memulai Cepat - Halaman 7
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Programming from the Processor (cont'd)
Word 0: (cont'd)
Bits 2/3: LDT Type and Connection Type - Set these bits according to the table below.
Bit 4: Measurement Unit - Set to '0' when programming the Full Scale Length in Inches and Temposonics
LDT Gradient in µSec/inch. Set to '1' when programming the Full Scale Length in millimeters and the
Temposonics LDT Gradient in µSec/mm.
Bit 5: Full Scale Length - Set this bit to '1' to change the Full Scale Length to the value in Output Word 3.
Bit 6: Full Scale Count - Set this bit to '1' to change the Full Scale Count to the value in Output Words 4
and 5.
Bit 7: Preset Value - Set this bit to '1' to change the Preset Value to the number in Output Words 6 and 7.
Note that this does not preset the position count. (See PRESET LDT Bit 0.)
Bits 8/9: Negative Direction and Positive Direction - Set these bits according to the table below.
Bit 14: E²PROM Clear - Set to clear an E²PROM Memory Fault or reset all parameters to default values.
Bit 15: Transmit Bit - 0Ž1 transition on this bit initiates a program transfer.
On a 0 Ž1 transition of the TRMT bit the 7551 will process the commands in the following order shown
below. If the module encounters an error it will set the approprite bit and stop processing the commands.
1)
Clear EEPROM Memory Fault
2)
LDT and Connection Type
3)
Measurement Unit
4)
LDT Gradient
5)
Full Scale Length
Once the 7551 has accepted and processed the commands, it will set/reset the appropriate fault diagnostic bits
and then set the ACKnowledge Bit. Once the ACK bit is set, check the error bits in Word 0 of the Input
Registers and then write 0000 into Word 0 of the Output Registers. This resets the TRMT bit. The module
will respond by resetting the ACK bit. The programming cycle is now complete and a new cycle can begin.
Plymouth Industrial Park, Terryville CT 06786
Tel: (203) 585-1254 Fax: (203) 584-1973
S
7500 I
ERIES
CONN
LDT
0
0
Temposonics LDT with DPM Module
0
1
AMCI LHT Series LDT
1
0
Temposonics LDT with RPM Module
1
1
Balluff LDT with K2 output / power supply option
+ DIR
- DIR
0
0
Remain at last programmed value.
0
1
Count increase for travel towards LDT head.
1
0
Count increase for travel away from LDT head.
1
1
Error condition. DIR Err Bit set. (Input Word 0, Bit 4)
The EEPROM is guaranteed for approximately 10,000 write cycles before writing to
it will cause a fault. Therefore continuously presetting the position or writing new
parameters should be avoided. If your application requires you to continuously
preset the position, consider calculating and applying the required position offset in
the PLC program.
LDT I
NTELLIGENT
6)
Full Scale Count
7)
Direction
8)
Preset Value
9)
Preset Position
M
NTERFACE
ODULE
7