6 System integration
6.1 Communication protocols
6.1.1 NTP
When enabled, the NTP (Network Time Protocol) service can use external time sources to synchronize
the device's system time. The NTP client service uses an Ethernet connection to connect to the NTP
time server. NTP can be enabled by setting the primary time server and the secondary time server
parameters to the address of the system's NTP time source(s).
Table. 6.1.1 - 158. Server settings.
Name
Range
Description
Primary time
server address
0.0.0.0...255.255.255.255 Defines the address of the primary NTP server. Setting this parameter at
"0.0.0.0" means that the server is not in use.
Secondary time
server address
0.0.0.0...255.255.255.255 Defines the address of the secondary (or backup) NTP server. Setting this
parameter at "0.0.0.0" means that the server is not in use.
Table. 6.1.1 - 159. Status.
Name
Range
Description
NTP quality for events
0: No sync
1:
Synchronized
Displays the status of the NTP time synchronization at the moment.
NO
NOTE
TE:: This indication is not valid if another time synchronization method is used
(external serial).
NTP-processed message
count
0...2
32
–1
Displays the number of messages processed by the NTP protocol.
Additionally, the time zone of the relay can be set by connecting to the relay and the selecting the time
zone at
Commands
→
Set time zone (AQtivate).
6.1.2 Modbus/TCP and Modbus/RTU
The device supports both Modbus/TCP and Modbus/RTU communication. Modbus/TCP uses the
Ethernet connection to communicate with Modbus/TCP clients. Modbus/RTU is a serial protocol that
can be selected for the available serial ports.
The following Modbus function types are supported:
• Read multiple holding registers (function code 3)
• Write single holding register (function code 6)
• Write multiple holding registers (function code 16)
• Read/Write multiple registers (function code 23)
The following data can be accessed using both Modbus/TCP and Modbus/RTU:
• Device measurements
• Device I/O
• Commands
• Events
• Time
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00028
243
Summary of Contents for AQ-T256
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