Rockwell Automation Allen-Bradley 1769-IF4, Руководство пользователя

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Publication 1769-UM002B-EN-P - July 2005
Module Data, Status, and Channel Configuration for the Output Modules 4-19
1769-OF8C and -OF8V
Input Data File
This data table file provides immediate access to channel diagnostic
information and analog output data at the module for use in the control
program. To receive valid data, you must enable the channel. The data table
structure is described below.
1769-OF8C and -OF8V Data Values
Words 3 through 10 contain the data echo of the analog data presently
commanded by the module for each output.
1769-OF8C and -OF8V Power Fail Bit (PF)
Word 0, bit 8, contains the analog power fail information for the output
channels (which is isolated from the system backplane power). If set (1), this
bit indicates that the analog power on the isolated output channel has failed. If
external user power is selected for the module, the external power supply may
be wired incorrectly or not supplying power. If internal (backplane) power is
desired, be sure the selector switch on the module is in the internal power
position.
1769-OF8C and -OF8V General Status Bits (S0 through S7)
Word 0, bits 0 through 7 contain the general status information for output
channels 0 through 7. If set (1), these bits indicate an error associated with that
channel. The over-range and under-range bits and the diagnostic bit are
logically ORed to this position.
Table 4.9 1769-OF8C and -OF8V Input Data Table
Wo
rd
Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 PF S7 S6 S5 S4 S3 S2 S1 S0
1 D3 H3 U3 O3 D2 H2 U2 O2 D1 H1 U1 O1 D0 H0 U0 O0
2 D7 H7 U7 O7 D6 H6 U6 O6 D5 H5 U5 O5 D4 H4 U4 O4
3 Channel 0 Data Value
4 Channel 1 Data Value
5 Channel 2 Data Value
6 Channel 3 Data Value
7 Channel 4 Data Value
8 Channel 5 Data Value
9 Channel 6 Data Value
10 Channel 7 Data Value