Rockwell Automation Allen-Bradley SLC 500 - Page 15

SLC 500 8-Point Analog Output Module 15
Publication 1746-IN026A-EN-P - July 2003
3. In Class 1 mode, the 1746-NO8 provides one status input word per channel.
Consideration should be given to implementation of user program logic to
monitor the status of the module. When a channel is disabled, its status
word is set to 0.
Check each channel’s configuration and status using Input Words 0 through
7. The Channel Status Words are addressed as follows:
In Class 1 mode, each channel status word contains the following useful
status information:
Bits 1 through 11 provide additional status information when Class 3 mode is
configured. For more definition of status word bit use, refer the SLC 500
8-Point Analog Output Modules User Manual, publication 1746-UM026.
Table 6 1746-NO8 Data Format Definitions for 1746-NO4 Data Format
Selected
Output Range
Data Value (counts) Corresponding Signal
Min. Max. Min. Max.
±10V dc
0 to 10V dc
0 to 5V dc
1 to 5V dc
0 to 20 mA
0 to 21 mA
4 to 20 mA
-32768
0
0
+3277
0
0
+6242
+32764
+32764
+16384
+16384
+31208
+32764
+31208
-10V dc
0V dc
0V dc
+1V dc
0 mA
0 mA
4 mA
+10V dc
+10V dc
+5V dc
+5V dc
20 mA
21 mA
20 mA
1746-NO8 Status Word Addressing
• I:e.0 - Slot e, Channel 0 Status Word • I:e.4 - Slot e, Channel 4 Status Word
• I:e.1 - Slot e, Channel 1 Status Word • I:e.5 - Slot e, Channel 5 Status Word
• I:e.2 - Slot e, Channel 2 Status Word • I:e.6 - Slot e, Channel 6 Status Word
• I:e.3 - Slot e, Channel 3 Status Word • I:e.7 - Slot e, Channel 7 Status Word
151413121110 9 8 7 6 5 4 3 2 1 0
Fatal Channel Error (0 = OK, 1 = error)
Module/SLC Resetting (0 = OK, 1 = reset)
Current Loop Open (0 = OK, 1 = open)
24V Power Failure (0 = OK, 1 = failure)
Module Enabled (0 = off, 1 = on)