GE GFK-1541B manual Send Information Report, Example1 Command Block-Basic Example

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Send Information Report (2010)

The Send Information Report COMMREQ requests that a particular block of memory within the PLC CPU reference tables be transferred periodically from an Ethernet Interface (SRTP Client) to a Host Application SRTP Server. The Command Block specifies the repetition period, the number of transfers to the server to perform, and the timeout allowed in waiting for each transfer to complete. The first send is performed immediately, regardless of the period specified.

Example1 Command Block–Basic Example

Establish a channel (Channel 7) to a remote Host application server at IP address 10.0.0.1. 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	00017	(0011)	Length of Send Information Report Data Block (17 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 unit for send period (3=seconds)
	Word 11	00007	(0007)	Minimum interval between host accesses (every 7 seconds)
The term local PLC is	Word 12	00050	(0032)	Timeout on each individual transfer response (500 ms)
	Word 13	00008	(0008)	Local PLC - Memory type from which to send data (%R)
used here to identify the
	Word 14	00050	(0032)	Local PLC - Starting address from which to send data (%R50)
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	00001	(0001)	Remote Network Address type (IP Address)
The term SRTP Server	Word 19	00004	(0004)	Remote Network Address length in words (4)
is used here to identify	Word 20	00010	(000A)	Remote Host - Register 1 of IP address (10)
the Host server.	Word 21	00000	(0000)	Remote Host - Register 2 of IP address (0)
	Word 22	00000	(0000)	Remote Host - Register 3 of IP address (0)
	Word 23	00001	(0001)	Remote Host - Register 4 of IP address (1)

*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.

(Word 7) Channel Command Number: Word 7 requests that a Send Information Report channel be set up. If the command is processed successfully, it will result in attempting the specified number of transfers from the client to the server.

(Word 8) Channel Number: Word 8 specifies the channel to be used for the send. This value must be in the range of 1–32 for Series 90-70 PLCs and 1–16 for Series 90-30 PLCs. If the channel number is out of range, a command error indication will be placed in the COMMREQ Status word. If the channel number is the same as a channel already in use, the channel will be re-tasked to perform this new command.

(Word 9) Number of Send Repetitions: Word 9 specifies the number of transfers to be performed before automatically completing the communications request and closing the channel.

GFK-1541B Chapter 3 Programming Channel Commands 3-23