ApStarnet allows users to modify and work with older systems that include Starnet.
Easy to install and configure Starnet HDLC/ESP to Modbus protocol converter for 4 RS485 communications Links.
Four multi use RS845 communications ports are provided.
Total galvanic isolation & transient protection.
Tx and Rx termination resistors user selectable.
Fully configurable from PLC code, or from software configuration package.
Simply connect to pre-existing Starnet/ESP serial links.
HDLC 48, 180 kb/sec baud rates, Primary or Secondary.
ESP 1200, 2400, 4800 and 9600 b/sec baud rates, Control or Tributary.

Flexible communications to control systems.
Use with Modbus, the most widely implemented protocol in industry.
Modbus TCP/IP or RTU (each of the four communications ports can provide Modbus RTU access).
Up to 16 Modbus TCP/IP clients supported.
Used with Siemens S7-1200, GE Fanuc Rx3i, Schneider Electric M340 and many more.

Full Starnet implementation is provided:

• This includes special function control implemented as user control messaging in the original product.
• Table exchange mode for up to 111 registers per partner, with user control.
• Independent link speeds.
• HDLC Ports can be either Primary or Secondary.
• ESP Ports can be either Control or Tributary.
• Up to 31 HDLC slaves per port.
• Up to 15 ESP Secondary units per port.
• Full support for Broadcast commands, with and without response.
• Compatible with Gem80 products, PLC and drives.

An existing Gem80 controller can be replaced with any modern PLC that can use Modbus TCP/IP or RTU. In this case the Apstarnet will communicate to existing devices that were using Starnet links.
Downstream devices like drives that communicate with a GEM80 can be replaced without changing the GEM80. In this case the Apstarnet can appear to be more than 1 slave.
There is also a USB port, which allows for configuration and diagnostic access. An application is available to allow configuration as well as simple diagnostic functionality.
The unit is powered by a 12-24Vdc power supply and is DIN rail mountable be default. It can also have the DIN rail adapter removed and be fixed directly to a panel backplane.

Useful Downloads

PC Application:
This application can be used for configuration and general monitoring: ApStarnetView (1.0.4.28)

Documents:
Modbus data map, which can be downloaded here:
Modbus Data Map Rev 01L (1.0.4.28)

The ApStarnet product manual is available here:
Manual Rev 00a

Product datasheet is available for download here:
Data Sheet Rev 001

Product application notes available for download here:
Application Notes for ApStarnet