Model: DDU-24/26
Doc. Ref. no. : - m06bom101
Issue no. 09
Page 44 of 51
User’s Manual
8.1.2 T-Format
The settings for this format are programmable. The full data message of T-format shall consist of 21
printable characters with a concluding CRLF as follows:
Table 7 T-Format
Description
Number of
Characters
Character
Position
Range of
Value/Information
Code Identification
1
1
Capital T
Divider
1
2
:
Year in Century
2
3,4
0 to 99
Divider
1
5
:
Month
2
6,7
1 to 12
Divider
1
8
:
Day of Month
2
9,10
1 to 31
Divider
1
11
:
Day of Week
1
12
1 to 7
Divider
1
13
:
Hours
2
14,15
0 to 23
Divider
1
16
:
Minutes
2
17,18
0 to 59
Divider
1
19
:
Seconds
2
20,21
0 to 59
Divider
1
22
:
GMT Marker
1
23
0 or 1
Validity Marker
1
24
0 or 1
CRLF
2
25,26
Non printing character
8.2 Wireless Time Frame Input
8.2.1 Wireless Clock Network
DDU-24/26 designed to create mesh network protocol to increase the range of DDU-24/26
network as shown in fig 12.
As shown in fig 12, there is Wireless master connected with GPS, which transmit the GPS time
code in 866 MHz frequency. Wireless master will transmit data on 0 RF channel, so please set
RF receive channel 0 on DDU-24/26 , all slave DDU-24/26 will get lock which are in range of
Wireless Master. As shown in figure S1, S2 and S3 are all in range of master so it will be directly
connect with master.
Slave device S4 is out of range from Wireless master so; it will not connect with master.
In DDU-24/26 we have given option of re-transmission of Received signal on configured channel
using key configuration, please refer section 6.2 for RF
– transmit and receive channel
configuration.
So please set S1, re-transmission on channel 1, S2 on Channel 2, S3 on channel 3, so you can
connect more slave devices(salve to Slave Delay <=1s) using this mesh protocol created by
DDU-24/26.
8.2.2 DDU-24/26 Re-Transmit Option Details
For increasing the network range and for creating the mesh network, DDU-24/26 has option of
re-transmission of received signal using key configuration.
You can configure 1-9 RF transmit channel and in case of you do not want re-transmit the signal
please select no option in key configuration.
