Spectrum-controls 1769sc-HART Modules Instrukcja Użytkownika Pobierz pdf (Strona 114)

Compact IO™ Isolated HART Analog Input Module

User's Manual 0300215-03 Rev. A

7-46

Table 7-20

Tag Name Value in Hex Description

HART_PASS_THRU_REQ_TX[0] 00 HART channel

HART_PASS_THRU_REQ_TX[1] 01 Pass-through command designator

HART_PASS_THRU_REQ_TX[2] 82 Start charcter

HART_PASS_THRU_REQ_TX[3] BE Long address byte 0

HART_PASS_THRU_REQ_TX[4] 02 Long address byte 1

HART_PASS_THRU_REQ_TX[5] 0C Long address byte 2

HART_PASS_THRU_REQ_TX[6] 77 Long address byte 3

HART_PASS_THRU_REQ_TX[7] 37 Long address byte 4

HART_PASS_THRU_REQ_TX[8] 23 HART command = 35 decimal

HART_PASS_THRU_REQ_TX[9] 09

Byte count

HART_PASS_THRU_REQ_TX[10] 20

Range units code = 32 decimal

HART_PASS_THRU_REQ_TX[11] 44

HART_PASS_THRU_REQ_TX[12] 16

HART_PASS_THRU_REQ_TX[13] 00

HART_PASS_THRU_REQ_TX[14] 00

HART_PASS_THRU_REQ_TX[15] C3

HART_PASS_THRU_REQ_TX[16] 16

HART_PASS_THRU_REQ_TX[17] 00

HART_PASS_THRU_REQ_TX[18] 00

HART_PASS_THRU_REQ_TX[19] FF Checksum

Upper Range value (This is a floating

point value = 600.0)

Note:

The bytes

are in reverse order.

Lower Range value (This is a floating

point value = -150 .0)

Note:

The bytes

are in reverse order.

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 Value in Hex Description

HART_PASS_THRU_QRY_RX[0] 00 HART channel

HART_PASS_THRU_QRY_RX[1] 00 Command Status

HART_PASS_THRU_QRY_RX[2]

Length of handle + HART response

data (Byte 1)

HART_PASS_THRU_QRY_RX[3]

Length of handle + HART response

data (Byte 2)

HART_PASS_THRU_QRY_RX[4] 02

Mes sage handle

HART_PASS_THRU_QRY_RX[5] 86

Start charcter

HART_PASS_THRU_QRY_RX[6] BE

Long address byte 0

HART_PASS_THRU_QRY_RX[7] 02 Long address byte 1

HART_PASS_THRU_QRY_RX[8] 0C Long address byte 2

HART_PASS_THRU_QRY_RX[9] 77 Long address byte 3

HART_PASS_THRU_QRY_RX[10] 37 Long address byte 4

HART_PASS_THRU_QRY_RX[11] 23 HART command = 35 decimal

HART_PASS_THRU_QRY_RX[12] 0B Byte count = 11 decimal

HART_PASS_THRU_QRY_RX[13] 00 Status Byte 0

HART_PASS_THRU_QRY_RX[14] 00 Status Byte 1

HART_PASS_THRU_QRY_RX[15]

20 Range units code = 32 decimal

HART_PASS_THRU_QRY_RX[16] 44

HART_PASS_THRU_QRY_RX[17] 16

HART_PASS_THRU_QRY_RX[18] 00

HART_PASS_THRU_QRY_RX[19] 00

HART_PASS_THRU_QRY_RX[20] C3

HART_PASS_THRU_QRY_RX[21] 16

HART_PASS_THRU_QRY_RX[22] 00

HART_PASS_THRU_QRY_RX[23] 00

HART_PASS_THRU_QRY_RX[24] F9 Checksum

Upper Range value (This is a floating

point value = 600) Note: The bytes are

in reverse order.

Lower Range value (This is a float ing

point value = -150) Note: The bytes

are in reverse order.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 185 186

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