Appendix; Advanced Functions: Dio Channel Offset - ICP DAS USA ZT-257 Series Quick Start Manual

5

Appendix

Advanced functions: DIO Channel Offset

5.1
The ZT-257x series module contains a built-in ZigBee DIO data concentrator function. This
function can be used to automatically connect to a number of remote DIO channels via a
ZigBee wireless network. Once connected, the status of a remote DIO channel can be retrieved,
and the data temporarily saved to the corresponding Modbus register. After the data has been
stored, it means that the remote PAC is able to read the data once and then, using the
Modbus protocol, write the data to multiple DIO channels on any remote ZigBee modules
connected to the ZT-257x module via the Ethernet, RS-232, or RS-485 interface.
I/O Exchange via the ZT-IOG ZigBee Network
ZT-2060-IOG
(6 DI + 4 DO)
A maximum of 280 digital channels are available when the ZT-257x module is acting as a DIO
data concentrator. These channels can be used to temporarily store the status of the DIO
channels on a ZT-20xx-IOG module via the network. However, before this function can be
used, a Channel Offset (DI/DO) must be configured for each ZT-20xx-IOG module, i.e., the
mapping between the Digital I/O channels on the ZT-20xx-IOG module and the Modbus
Register on the ZT-257x module must be set so that the status of the DIO channels on the
ZT-20xx-IOG modules can be remotely read or written using the mapping address.
ICP DAS, ZT-257x DIO Data Concentrator Quick Start Guide, v1.0
RS-232/RS-485
Ethernet
ZT-2570 / ZT-2571
(280 CH Digital I/O Concentrator)
ZT-2055-IOG
(8 DI + 8 DO)
Copyright © 2016, by ICP DAS Co., LTD. All Rights Reserved
MODBUS_RTU
MODBUS_TCP
ZT-2053-IOG ZT-2043-IOG
(14 DI) (14 DO)
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