Real-Time Clock Settings
The TeSys Tera system has an internal clock and remembers the date and time for 12 hours without power.
The table lists the Real-Time Clock (RTC) settings for the Modbus RTU communication.
|
Address |
Register |
No. |
Function code |
RW |
X | Unit |
Type |
Range | Default value |
Svd |
Description |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
0x113B |
4412 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
1–31 |
1 |
Y |
Date |
|
0x113C |
4413 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
1–12 |
1 |
Y |
Month |
|
0x113D |
4414 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
2000–2099 |
2016 |
Y |
Year |
|
0x113E |
4415 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
0–23 (step 1) |
0 |
Y |
Hour |
|
0x113F |
4416 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
0–59 (step 1) |
0 |
Y |
Minute |
|
0x1140 |
4417 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
0–59 (step 1) |
0 |
Y |
Second |
|
0x1141 |
4418 |
2 | – | – | – | – | – | – | – | – |
Reserved |
|
0x1143 |
4420 |
1 |
0x03, 0x10 |
RW |
1 | – |
UINT16 |
0–1 |
0 |
N |
Update RTC |
Write date and time to the following Modbus holding registers with address 4412, function code 16 (multiple holding registers), and number of register is 9.
For example, to update 01-Jan-2023 12:00:00, register values should be as below format:
| Parameter name | Register | Example data | Data format (Big-endian) |
|---|---|---|---|
|
Date |
4412 |
1 | 0x0001 |
|
Month |
4413 |
1 | 0x0001 |
|
Year |
4414 |
2023 | 0x07E7 |
|
Hour |
4415 |
12 | 0x000C |
|
Minute |
4416 |
0 | 0x0000 |
|
Second |
4417 |
0 | 0x0000 |
|
Reserved |
4418 |
0 | 0x0000 |
|
Update RTC |
4420 |
0 | 0x0001 |