Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 72)

2–52 How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
Definition
Decimal Bit
(Octal Bit)
Word
Bits 00 Reserved
Bits 01 CalibrationDone bit (DN). - This bit is set to 1 after a calibration cycle is completed.
Bit 02
CalibrationBad bit (BD). - This bit is set to 1 if the channel calibrationn coefficients
cannot be saved or be read properly.
Bits 03-07 Set to 0.
Word 5
Bits 08-11
(10-12)
Reserved
Word 5
Bit 12 (14) Set to 0
Bit 13 (15)
Configuration mode bit (CF) - This bit is set (1) when the calibration mode is
selected (bit 15, word 5 in the block transfer write set to 1).
Bit 14 (16)
Field Power Off bit (FP) - This bit is set (1) when the 24V field power fails. When
this bit is set (1), the module status indicator flashes.
Bit 15 (17)
Power Up (unconfigured state) bit (PU). - This bit is set (1) when the configuration
word is all zeroes (0) due to a reset (adapter power cycle or module insertion) or a
cleared configuration word (all 0).
Bits 00-01
Underrange bits (U). - These bits are set (1) when the input channel is below a
preset limit as defined by the configuration selected. U0 (bit 00) corresponds to input
channel 0 and U1 (bit 01) corresponds to input channel 1
Bits 02-03
WireĆOff status bits. (W). - These bits, when set (1), indicate the corresponding
current output channel is open. W0 (bit 02) corresponds to channel 0, and W1 (bit 03)
corresponds to channel 1.
Word 6
Bits 04-05
Overrange bits (V). - These bits are set (1) when the input channel is above a
preset limit as defined by the configuration selected. Bit 04 corresponds to input
channel 0 and bit 05 corresponds to input channel 1
Bits 06-09
(06-11)
Not used. Set to 0.
Bits 10-11
(12-13)
Hold output bits (P). - These bits are set (1) in response to Q0 or Q1 and a
transition of the EN bit. When P0 or P1 is set (1), they indicate that the output is
holding at the level in the readback data for the respective channel. These bits return
to 0 when the output data matches the readback output data.
Bits 12-15
(14-17)
Not used. Set to 0.
Write Word 1 Bits 00-12
(00-14)
Not used
Bit 13-14
(15-16)
Safe State Source bits (S1/S0). - When EN is 0, these bits designate the source of
the safe state data.
Bit 13 = 0, bit 14 = 1 - reset outputs to 0V/0mA
Bit 13 = 1, bit 14 = 1 - hold the output at its current level
Bit 15 (17) Output enable bit (EN). - When set (1), the outputs are enabled. This bit must be
set in order for the real time data to appear at the outputs. If this bit is not set (0), the
outputs will be determined by S1/S0.
Word 2 Bits 00-15
(00-17)
Output Channel 0 data. Refer to Table 2.A.
Word 3 Bits 00-15
(00-17)
Output Channel 1 data. Refer to Table 2.A.