This chapter provides the information you need to install the DAS for Modicon programmable controllers and to configure your system.

2.1 Installation Requirements

Review the following hardware and software requirements to ensure that your system is prepared for the DAS for Modicon programmable controllers installation.

2.1.1 Hardware

The hardware requirements for the DAS for Modicon programmable controllers are the same as those for the BASEstar Open software. For specific hardware requirements, refer to the BASEstar Open for Tru64 UNIX Installation Guide .

Additional hardware required for configuring the DAS for Modicon programmable controllers using Modbus includes:

• Any supported Modicon programmable controller.
• J478 Modbus modem to connect to the Tru64 UNIX system.
• J478 Modbus modem to connect to the programmable controller.
• A cable from the Tru64 UNIX system to the Modbus modem.
• J374 Modbus communications adapter if using Modicon 184 or 384 programmable controllers.
• J474 Modbus communications adapter if using Modicon 484 programmable controllers.

Figure 2-1 shows the required hardware for each model of programmable controller.

Figure 2-1 Modbus Communications

The cable to the J478 Modbus modem must be terminated with a 25 pin male RS232-C connector with pinouts as shown in Figure 2-2.

Figure 2-2 Modbus RS-232 Pinouts

Additional hardware required for configuring the DAS for Modicon programmable controllers using Modbus over TCP/IP includes:

• Any supported Modicon Quantum Automation Series programmable controller model that supports the Modicon Quantum Ethernet TCP/IP Module
• Modicon Quantum Ethernet model 140 NOE 211 00 (twisted pair) module
• Modicon Quantum Ethernet model 140 NOE 251 00 (fiber optic) module
• Ethernet hub

Quantum Automation Series programmable controllers are supported by the DAS using the Modicon 984 protocol profile(s).

Figure 2-3 shows the hardware required to use Modbus over TCP/IP.

Figure 2-3 Modbus TCP/IP Communications

The following software must be installed prior to installing DAS for Modicon programmable controllers:

• Tru64 UNIX Version 3.2C
• BASEstar Open for Tru64 UNIX Version 3.1

For more information on installing BASEstar Open software, refer to the BASEstar Open for Tru64 UNIX Installation Guide.

In addition to the above software, if Modbus TCP/IP is being used, the following software must also be installed:

• TCP/IP Services for OpenVMS

Table 2-1 lists the disk space required to install the DAS for Modicon programmable controllers. The space requirements are approximations; actual sizes may vary depending on your system environment and configuration.

Table 2-1 Disk Space Requirements

Usage	Approximate Space Requirements (Kilobytes)
Peak (during installation)	900
Net (after installation)	500