Spectrum Controls 1769sc-IF4IH User Manual page 114

7-46
Compact IO™ Isolated HART Analog Input Module
User' s Manual 0300215-03 Rev. A
Table 7-20
Tag Name
HART_PASS_THRU_REQ _TX[0]
HART_PASS_THRU_REQ _TX[1]
HART_PASS_THRU_REQ _TX[2]
HART_PASS_THRU_REQ _TX[3]
HART_PASS_THRU_REQ _TX[4]
HART_PASS_THRU_REQ _TX[5]
HART_PASS_THRU_REQ _TX[6]
HART_PASS_THRU_REQ _TX[7]
HART_PASS_THRU_REQ _TX[8]
HART_PASS_THRU_REQ _TX[9]
HART_PASS_THRU_REQ _TX[10]
HART_PASS_THRU_REQ _TX[11]
HART_PASS_THRU_REQ _TX[12]
HART_PASS_THRU_REQ _TX[13]
HART_PASS_THRU_REQ _TX[14]
HART_PASS_THRU_REQ _TX[15]
HART_PASS_THRU_REQ _TX[16]
HART_PASS_THRU_REQ _TX[17]
HART_PASS_THRU_REQ _TX[18]
HART_PASS_THRU_REQ _TX[19]
The HART message string, shown in Table 7-20, performs HART command 35 (write
range values). Once the tags are populated with the HART message, the message can be
sent using the ladder in Figure 7-10. The reply for the HART command will be found in
the If4ih0PassThruQryRX tag. The response message should look like the table shown
below.
Table 7-21
Tag Name
HART_PASS_THRU_QRY_RX[0]
HART_PASS_THRU_QRY_RX[1]
HART_PASS_THRU_QRY_RX[2]
HART_PASS_THRU_QRY_RX[3]
HART_PASS_THRU_QRY_RX[4]
HART_PASS_THRU_QRY_RX[5]
HART_PASS_THRU_QRY_RX[6]
HART_PASS_THRU_QRY_RX[7]
HART_PASS_THRU_QRY_RX[8]
HART_PASS_THRU_QRY_RX[9]
HART_PASS_THRU_QRY_RX[10]
HART_PASS_THRU_QRY_RX[11]
HART_PASS_THRU_QRY_RX[12]
HART_PASS_THRU_QRY_RX[13]
HART_PASS_THRU_QRY_RX[14]
HART_PASS_THRU_QRY_RX[15]
HART_PASS_THRU_QRY_RX[16]
HART_PASS_THRU_QRY_RX[17]
HART_PASS_THRU_QRY_RX[18]
HART_PASS_THRU_QRY_RX[19]
HART_PASS_THRU_QRY_RX[20]
HART_PASS_THRU_QRY_RX[21]
HART_PASS_THRU_QRY_RX[22]
HART_PASS_THRU_QRY_RX[23]
HART_PASS_THRU_QRY_RX[24]
Value in Hex
00 HART channel
01 Pass-through command des ignator
82 Start charcter
BE Long address byte 0
02 Long address byte 1
0C Long address byte 2
77 Long address byte 3
37 Long address byte 4
23 HART command = 35 decimal
09
Byte count
20
Range units code = 32 decimal
44
Upper Range value (This is a floating
16
point value = 600.0) Note: The bytes
00
are in reverse order.
00
C3
Lower Range value (This is a floating
16
point value = -150.0) Note: The bytes
00
are in reverse order.
00
FF Check sum
Value in Hex
00 HART channel
00 Command Status
Length of handle + HART response
15 data (Byte 1)
Length of handle + HART response
data (Byte 2)
0
02
Mes sage handle
86
Start charcter
BE
Long address byte 0
02 Long address byte 1
0C Long address byte 2
77 Long address byte 3
37 Long address byte 4
23 HART command = 35 decimal
0B Byte count = 11 decimal
00 Status Byte 0
00 Status Byte 1
20 Range units code = 32 decimal
44
Upper Range value (This is a floating
16
point value = 600) Note: The bytes are
00
in reverse order.
00
C3
Lower Range value (This is a floating
16
point value = -150) Note: The bytes
00
are in reverse order.
00
F9 Checksum
Descr iption
Description