PLC communication is a vital component of any control system. With the many networking options available, including Ethernet and serial, PLC systems need to have adequate ports and protocols. The DirectLOGIC 405 CPUs have built-in serial ports; optional modules can provide protocol conversions or additional communication ports.
The ECOM modules plug into any I/O slot of any local DL405 I/O base, including expansion bases when using the DL450 CPU.
The module maintains identification data, descriptive information, and communication parameters for PLC-to-PLC communications in flash memory. Disconnect power before installing or removing any PLC module.
The H4-ECOM100 supports the industry standard MODBUS TCP/IP Client/Server protocol in addition to the standard IP and IPX protocols. This allows the DL405 PLC with an H4-ECOM100 module to serve as a client (master) or as a server (slave) on a MODBUS TCP/IP Ethernet network.
The H4-ECOM100 can actively issue MODBUS commands to other nodes or devices on the MODBUS TCP/IP network or simply respond to connected MODBUS TCP/IP clients.DL405 PLC Ethernet Communication Modules Overview
NOTE: The DL405 CPUs also support a MODBUS RTU master and slave module for connection to a MODBUS RTU network. These modules are documented in other sections.
The DirectLOGIC 405 (DL405) programmable logic controller (PLC) offers the following accessories for converting RS232 to RS422 or RS422/485 and for simple RS232C networking:
NOTES:New option modules may not be supported by CPUs purchased prior to the modules release.
Be sure to check for the latest firmware for your PLC. You can refer to the module specification page on our Web site for
this information, or find it in our free catalog.
Here is the direct link to the Firmware Upgrade section of our Web site where you can find the firmware revision histories, the latest files and tools required to download the firmware into your CPU.