3

Example 2 Command Block–Example using a Network Address name

This example is the same as Example 1 except that the Network Address name of the remote host (“PLC_1aa”) is used instead of its IP address. For more information on Network Address names, see the chapter: “Network Administration Support”.

Establish a channel (Channel 7) to a remote host application server with a Network Address name of “PLC_1aa”. Return the COMMREQ Status word to %R10. Send local PLC registers %R50–%R57 to remote host. Repeat the send 10 times, once every 7 seconds, with a timeout of 500 ms for each transfer.

 

 

Dec

(Hex)

 

 

Word 1

00045

(002D)

Length of Send Information Report Data Block (45 words)

 

Word 2

00000

(0000)

Always 0 (no-wait mode request)

 

Word 3

00008

(0008)

Memory type of CRS word (%R)

 

Word 4

00009

(0009)

CRS word address minus 1 (%R10)*

 

Word 5

00000

(0000)

Reserved

 

Word 6

00000

(0000)

Reserved

 

Word 7

02010

(07DA)

Send Information Report Channel command number

 

 

 

Word 8

00007

(0007)

Channel number (7)

 

Word 9

00010

(000A)

Number of repetitions (send 10 times)

 

Word 10

00003

(0003)

Time units for send period (3=seconds)

 

Word 11

00007

(0007)

Minimum interval between host accesses (every 7 seconds)

 

Word 12

00050

(0032)

Timeout on each individual transfer response (500 ms)

The term local PLC is

Word 13

00008

(0008)

Local PLC - Memory type from which to send data (%R)

Word 14

00050

(0032)

Local PLC - Starting address from which to send data (%R50)

used here to identify the

client PLC—the PLC

Word 15

00008

(0008)

Local PLC - Number of memory units (8 registers)

that initiates the

Word 16

00000

(0000)

Reserved

communications

Word 17

00000

(0000)

Reserved

request.

Word 18

00003

(0003)

Remote Host - Network Address type (3=Symbolic Name)

 

Word 19

00032

(0020)

Remote Host - Network Address length in words (32)

The term SRTP Server

Word 20

19536

(4C50)

Remote Host - Network Address name, char 1–2 (PL)

is used here to identify

Word 21

24387

(5F43)

Remote Host - Network Address name, char 3–4 (C_)

the Host server.

Word 22

24881

(6131)

Remote Host - Network Address name, char 5–6 (1a)

 

Word 23

00097

(0061)

Remote Host - Network Address name, char 7–8 (a )

 

Word 24

00000

(0000)

Remote Host - Network Address name, char 9–10

 

Word 25

00000

(0000)

Remote Host - Network Address name, char 11–12

 

Word 26

00000

(0000)

Remote Host - Network Address name, char 13–14

 

Word 27

00000

(0000)

Remote Host - Network Address name, char 15–16

 

Word 28

00000

(0000)

Remote Host - Network Address name, char 17–18

 

Word 29

00000

(0000)

Remote Host - Network Address name, char 19–20

 

Word 30

00000

(0000)

Remote Host - Network Address name, char 21–22

 

Word 31

00000

(0000)

Remote Host - Network Address name, char 23–23

 

Word 32

00000

(0000)

Remote Host - Network Address name, char 24–25

 

Word 33

00000

(0000)

Remote Host - Network Address name, char 26–27

 

Word 34

00000

(0000)

Remote Host - Network Address name, char 28–29

 

Word 35

00000

(0000)

Remote Host - Network Address name, char 30–31

 

Word 36–51

 

 

Reserved: set to zero

*Word 4 (CRS word address) is the only zero-based address in the Command Block. Only this value requires subtracting 1 from the intended address.

3-26

TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002

GFK-1541B

Page 93
Image 93
GE GFK-1541B manual Word 24387 5F43 Remote Host Network Address name, char 3-4 C