ZT-2551 - RS-485/RS-232 to ZigBee Slave Converter
- QuickStart (Apr/2017)
ICP DAS USA, Inc.
| 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
8
c.
Gateway Mode
is an advanced application mode and it is used to convert the Modbus protocol. But
there is only RS‐232 and RS‐485 interface supported in the ZT‐255x device, so the data is always
regarded as Modbus RTU format.
Module Frame Type Note
Broadcast
Data is sent to all of ZigBee slaves
(Default)
ZT‐2550 Unicast
Data will be sent to a specific ZigBee slave.
The Address of DCON/Modbus command is regarded as
destination ZigBee address
(Advanced)
ZT‐2551 Unicast
Data only be sent to coordinator
[Eg1] When ZT‐2550/ZT‐2570 recei ves data “MRTU_CMD_01” from serial
port,
→ZT
‐2551 will output the data “MRTU_CMD_01” to serial port directly.
[Eg2] When ZT‐2570 receives data “MTCP_CMD_02” from Ethernet,
→ZT
‐2551 will convert protocol then output “MRTU_CMD_01” to serial port.
[Eg3] When ZT‐2551 transmits the acknowledgement “MRTU_ACK_03”,
→ZT
‐2550/ZT‐2570 will response the acknowledgement “MRTU_ACK_03” to
serial port directly.
→ZT
‐2570 will convert protocol then output “MTCP_CMD_01” to Ethernet.
(Note: Unicast type frame, data will only be sent to the ZigBee host)
MODBUS RTU
Serial
ZC_0000
Ethernet MODBUS TCP
MODBUS TCP Ethernet
Serial
MODBUS RTU
ZS_0001
※
There is an “Advanced Settings” to the Gateway Mode for some specific users,
please refer the user manual section 7.2 “DCON/Modbus Device Communication” for
more information.
