Access To The Web Server; Time Stamp - Siemens CP 1243-8 IRC Operating Instructions Manual

Configuration and operation

4.9 Access to the Web server

4.9 Access to the Web server
Access to the Web server of the CPU
The Web server of the S7-1200 station is located in the CPU. Via the LAN interface of the
CP, you have access to the Web server of the CPU.
Access using HTTPS: When there is secure access (HTTPS) to the Web server using the IP
address of the CP, the SSL certificate of the CPU is displayed.
4.10

Time stamp

Time stamp
The values of the data points are transferred by the CP with a time stamp. The time stamp is
coded in 2 double words. The exception is the half byte (nibble) with the time status.
The two double words have the following assignment:
Table 4- 6
Name of the double word
RecTimeStamp_1
RecTimeStamp_2
Table 4- 7
Bit No.
96
Assignment of the two double words
Byte no. Content
The assignment of the half byte with the time status (low nibble of byte 3 of Rec-
TimeStamp_2)
Value Meaning
0 0 Time is invalid
1 Time is valid
1 0 Standard time
1 Daylight saving time
Not used
2
3 Not used
High nibble
0 Year * 10
1 Month * 10
2 Day * 10
3 Hour * 10
0 Minute * 10
1 Second * 10
2 Millisecond * 100
3 Millisecond * 1
Operating Instructions, 06/2015, C79000-G8976-C385-01
Low nibble
Year * 1
Month * 1
Day * 1
Hour * 1
Minute * 1
Second * 1
Millisecond * 10
Time status
CP 1243-8 IRC