Rockwell-automation 57C442 Data Highway Plus Interface Module Instrukcja Użytkownika Pobierz pdf (Strona 32)

4-14

05 REM The variables that follow define &

parameters for the &

GATEWAY CMD OK@ function

10 COMMON B3BASE%\! Represents the physical address of &

starting register on the Data Highway &

Plus module to be read from

20 LOCAL DST% \! The address of the bridge node on &

the local Data Highway Plus network

21 LOCAL STS% \! The location where the status &

resulting from the operation is stored

22 LOCAL SZE% \! The number of registers to be &

transferred

23 LOCAL CMD% \! The Data Highway Plus command &

sent by the module

30 DST% = 34

31 STS% = 0

32 SZE% = 100

33 CMD% = 3

40 IF NOT GATEWAY_CMD_OK@(STS%, CMD%, DST%, &

“!01.24.00.00.84.00.80.00.00.14.00.00.N7:0”, &

VARPTR! (B3BASE%), SZE%) THEN 20000 \! process errors

In the example above, the routing bytes were determined as

follows.Recall that the last item in the actual ”slave_reg” parameter is

the destination file address.

Byte Value Meaning

1 LSAP 01 for a 1785-KA bridge

2 24h

3 DID_LO 00 for a 1785-KA bridge

4 DID_Hl 00 for a 1785-KA bridge

5 DNDE_LO 84h (see below)

6 DNDE_Hl 00 for a 1785-KA bridge

7 LIFETIME 80h for a1785-KA bridge

8 SID_LO 00 for a 1785-KA bridge

9 SID_HI 00 for a 1785-KA bridge

10 SNDE_HI

14h is the station number of the Data Highway

Plus module

11 SNDE_LO 00 for a 1785-KA bridge

12 NSAP 00 for a 1785-KA bridge

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 61 62

Brak uwag

Rockwell-automation 57C442 Data Highway Plus Interface Module Instrukcja Użytkownika Strona 32