Spectrum Controls 1756sc-OF8H Series A - Manual (Page 7)

Table of Contents vii
Enabling and Using
HART on the
1756sc-IF8H and
OF8H 67
Configuring the Modules for HART ...................................................................... 67
Figure 7.1 (Channel 0 Configuration Example) ....................................................... 68
Figure 7.2 (Channel 0 Configuration Example) ....................................................... 69
How the Modules Send and Receive HART Data ................................................. 69
Figure 7.3 (Primary, Secondary and Slave connection).......................................... 70
Figure 7.4 (Connected and Unconnected messaging) ........................................... 71
Figure 7.5 (Auto Acquisition Flow)........................................................................ 72
Table 7.1(Packet 0) .................................................................................................. 73
Table 7.2(Packet 1) .................................................................................................. 74
Table 7.3 (Packet 2) ................................................................................................. 75
Table 7.4 (Packet 3) ................................................................................................. 76
Table 7.5 (Packet 4) ................................................................................................. 76
Figure 7.6 (Demultiplexing Ladder) ........................................................................ 77
Figure 7.7 (Message Instruction) ........................................................................... 78
Table 7.6 (Generic CIP Configuration) .................................................................... 79
Figure 7.8 (Message Configuration Dialog) ........................................................... 79
Table 7.7 (Get HART Device Information Command) ............................................ 80
Table 7.8 (Response If Device Information Is Not Available) ................................ 80
Table 7.9 (Response When Device Information Is Available) ............................... 81
Figure 7.9 (Sending a Module Specific Command Using Ladder) ......................... 82
Table 7.10 (HART Suspend and Resume Command) ............................................. 83
Table 7.11 (HART Suspend and Resume Reply Packet) ........................................ 83
Table 7.12 (HART Pass-Through Command Request) .......................................... 85
Table 7.13 (HART Pass-Through Command Request Reply) ................................ 86
Table 7.14 (HART Pass-Through Command Complete Query) .............................. 87
Table 7.15 (HART Pass-Through Command Complete Query Reply) ................... 87
Table 7.16 (HART Pass-Through Command Complete Query - Reply Packet
Structure) ................................................................................................................ 88
Figure 7.10a (HART Pass-Through Request and Query Process) ........................ 90
Figure 7.10b (HART Pass-Through Request and Query Process) ........................ 91
Figure 7.10c (HART Pass-Through Request and Query Process) ........................ 92
Figure 7.10d (HART Pass-Through Request and Query Process) ........................ 93
Figure 7.10e (HART Pass-Through Request and Query Process) ........................ 94
HART Protocol Overview....................................................................................... 94
Figure 7.11 (HART Message Structure) ................................................................. 94
Table 7.17 (Start Character Definition) ................................................................... 95
Figure 7.18 (Long Frame Address) ......................................................................... 96
Sending a HART Command to a Field Device via Pass-through........................... 97
Figure 7.19 .............................................................................................................. 98
Figure 7.20 .............................................................................................................. 98
Programming
Examples 99 Initial Programming ................................................................................................. 99
Figure 8.1 (Sample Ladder Logic) ......................................................................... 100
Demultiplexing HART Data .................................................................................. 104
Figure 8.2 (IF8H Demultiplexing Ladder) .............................................................. 104
Figure 8.3 (OF8H Demultiplexing Ladder) ............................................................ 105
Sending HART Commands Using the MSG Instruction ..................................... 106