AMCI 7551 Skrócona instrukcja obsługi - Strona 5
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Data Format
The format of the position, velocity, and fault diagnostics, is shown below. A fault diagnostic bit is set to '1' to
indicate an error. Errors can be Software Errors, set when parameters are incorrect, or Hardware Errors, set when
there is a hardware failure or a parameter is valid but will not work with the hardware. An example of this is setting
the Connection Type to RPM when there is a DPM Module in the LDT. Position and velocity data is transferred in
two words. The first word of data contains the upper three or four digits of the value, while the second word
contains the bottom three digits of the value. For example, let the position data equal 31,416. The first word of
position data contains the binary number 31, and the second word contains the binary number 416. If the position
data is negative, data is transfered in sign-magnitude format.
Word 0:
Bit 0: Gradient Error - Set when Gradient Value is outside the expected range. Causes for this error are
incorrect gradient value or incorrect GRAD TYPE or Measurement UNIT bits in Output Word 0.
Bit 1: Length Error - The Full Scale Length is outside the expected range. Range of Length values are 2 to
327 inches or 50 to 8305 millimeters. Note that this error can be caused by setting the Length greater
than 327 mm and having the Measurement unit specified as inches.
Bit 2: Full Scale Count Error - The Full Scale Count is not in the range of 2 to (Length * 1000) if Measure-
ment Unit is specified as inches or 2 to (Length * 10) if Measurement Unit is specified as millimeters.
Bit 3: Position Preset Error - Set when Preset Value is outside the range of -999,999 to 999,999.
Bit 4: Direction Error - Set when +DIR and -DIR bits are both set to '1'.
Bit 6: SPIOGA Error - Set on SPIOGA communications error.
Bit 7: Message Ignored - If an error bit is set, the error must be cleared by programming the effected
parameter. This bit is set if you attempt to program a different parameter before clearing the error.
Bit 12: E² Error - Set on EEPROM Memory Fault.
Bit 14: LDT Error - Set on Transducer Fault. This error can be caused by improperly programming the
Connection Type parameter, a faulty transducer or improper installation.
Bit 15: Acknowledge Bit - Used to acknowledge a program transfer.
Word 1:
Bit 15: Position Sign - Set when position value is negative.
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S
7500 I
ERIES
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Word 0
0
0 0 0 0
Word 1
0 0 0 0
Word 2
0 0 0 0 0 0
Word 3
0 0 0 0 0 0
Word 4
0 0 0 0 0 0
WORDS 5-7 RESERVED: Set to zero
LDT I
NTELLIGENT
0
Upper 3 or 4 digits: Position Value
Lower 3 digits: Position Value
Upper 3 digits: Velocity Value
Lower 3 digits: Velocity Value
M
NTERFACE
ODULE
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