The Data Area used to send the sample data with compressed timestamping is stored in Holding Registers 40200 through 40208. The sample data being sent is:

	Register	Local Example	Bridge Example
Network address of sending PLC	40200	0	1030(x0406)
	40201	0	0
	40202	0	0
Address of point receiving unsolicited data	40203	30017	30017
Number of bytes of data.	40204	32770	32770
First timestamp word	40205	16384	16384
Second timestamp word	40206	10201	10201
Third timestamp word	40207	29419	29419
Fourth timestamp word	40208	22477	22477
The unsolicited value	40209	21035	21035

Holding Registers 40203 through 40209 contain a command to the CIMPLICITY Modbus TCP/IP communications enabler to set the value of a point at Input Register 17 to a value of 21035 with a date of May 14, 1997 and time 11:43:09.985.

The network address of the sending programmable controller is the Modbus TCP/IP.

For local data, the path is only 1 address long and the sending controller's IP address is put into the lower byte of the first holding register. The other two holding registers are set to zero.

For bridged data, the path may be 5 addresses long. The example above shows the path 6.4.0.0.0.

More information

Sample MSTR Block - Compressed Timestamping with mSecs.

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