Output Image Table Bits - Vishay Precision Group BLH DXp-40 Interface Manual

3.2

OUTPUT IMAGE TABLE BITS

Table 3-2 shows the structure and bit definition of
each Output Image Table word. Reference Figure 2-3
to view word breakouts.
Word 1 Unused
Word 2
BIT 0 GROSS/NET (0= GROSS)
Used for requesting total gross or net weigh data. If = 0 gross weigh data will be returned to the input image table. If = 1 net weigh
data will be returned.
BIT 1 ZERO
If this bit changes from 0 to 1 the dxp40 will zero the gross weight If not currently in "motion" as determined by the motion status bit or if not outside
the settable zero band. If the zero function is successful the GROSS ZERO JUST ACQUIRED bit (3) in the status 1 register will be set for approx. 2
seconds. If not successful bit 10, UNABLE TO TARE OR ZERO, in word 2 of the input image table and either bit 1, UNABLE TO TARE/ZERO
BECAUSE OF MOTION, or bit 2, UNABLE TO ZERO BECAUSE OF LIMIT, of the status 1 register will be set for approx 2 seconds.
BIT 2 TARE
If this bit changes from 0 to 1 the dxp40 will tare the net weight if not currently in "motion- as determined by the motion status bit. If the tare function
is successful the NET TARE JUST ACQUIRED bit (4) in the status 1 register will be set for approx. 2 seconds. If not successful bit 10, UNABLE TO
TARE OR ZERO, in word 2 of the input image table and bit 1 UNABLE TO TARE/ZERO BECAUSE OF MOTION, of the status 1 register will be set
for approx 2 seconds.
BIT 3 FILTER SELECT (0= FILTER 1, 1 = FILTER 2)
This bit is ored with the discrete filter select input as shown in the following table:
INPUT
SELECT
FILTER 1
FILTER 1
FILTER 2
FILTER 2
BIT 4 RESET FILTER
If this bit changes from 0 to 1 the dxp40 win reset or restart the filter using data from the current aid conversion. This may be helpful in overcoming
time lags caused by heavy averaging.
BIT 5 INHIBIT BAND FILTER
When this bit is set to 1 the band filter Is inhibited. Set to 1 for a minimum of 50 milliseconds and then reset to 0 resets the band filter. If the band is
wide, and heavy averaging is applied this will quicken the response to small signal changes which fall within the band width. When the band fitter is
reset quick centering algorithms will rapidly find the center of a noisy input signal.
BIT 6 CLEAR FAULT
Setting this bit will clear all fault bits in status register 3 except for eeprom faults. Eeprom faults require the dxp40 to be reset. If the a/c1 over/under-
range faults persist the corresponding fault flags will be set again when this bit returns to 0.
BIT 7 SCAN ACKNOWLEDGE
This bit is set or reset by the plc to achieve data transfer synchronization between the plc's program scan and the remote I/O scan. When the DXp40
receives the output image table data it copies this bit to the same location in the input image table. The plc can thus know if the remote i/o DXp40
has received the last write to the output image table.
BIT 8 SETPOINT #1 ENABLE (1= ENABLE)
Setting this bit to 1 enables the dxp40 setpoint #1 output to be controlled by the cbcp40. If reset to 0 the setpoint #1 output is controlled by BIT 12.
BIT 9 SETPOINT #2 ENABLE (1= ENABLE)
Setting this bit to 1 enables the dxp40 setpoint #2 output to be controlled by the dxp40. If reset to 0 the setpoint #2 output is controlled by BIT 13.
BIT 10 SETPOINT #3 ENABLE (1= ENABLE)
Setting this bit to 1 enables the dxp40 setpoint #3 output to be controlled by the cbcp40. If reset to 0 the setpoInt #3 output is controlled by BIT 14.
Table 3-2. Output Image Table Word/Bit Definitions
BIT 3 FILTER
SELECTED
0 FILTER 1
1 FILTER 2
0 FILTER 2
1 FILTER 2
3-2