Connecting to Signal Ground

　　The internal signal grounds (logic and field) are allowed to float with respect to the safety ground. In most installations, it is best to tie the signal ground and safety ground together at one and only one point.

　　Connecting Shields to Earth

　　Connect a cable shield at one end of the cable, typically at the controller. Also, a connection should be provided near the termination panel using an external shield bus bar. Such bus bars are available from Phoenix Contact or other terminal block suppliers. You should individually connect each shield bus bar to a suitable, quiet ground point, such as a dedicated protective earth or a DCS master reference ground, as shown on page 155.

　　Connecting to a TriStation PC

　　You can connect a Trident controller to a TriStation PC using a 10BaseT cross-over cable or an Ethernet network hub. This section provides instructions for both methods.

　　An MP uses Ethernet protocol to communicate with a TriStation PC and requires the installation of an Ethernet card, a 10BaseT cross-over cable, and the Data Link Control (DLC) protocol in the PC.

　　Connecting TriStation to an MP Port

　　If your controller does not include a Communication Module, you must connect the TriStation PC to one of three TriStation ports on the MP Baseplate. You can make a direct connection using a 10BaseT cross-over cable, or you can connect using a 10BaseT straight-through cable to an Ethernet network or hub.

　　To connect a TriStation PC to an MP port using a cross-over cable:

　　Attach one end of the cross-over cable to one of the RJ-45 connectors on the MP Baseplate. This is normally MP A, as shown in the following illustration.

　　Attach the other end of the cross-over cable to the network adapter card in the PC.

　　For instructions on logically connecting a controller to a TriStation PC and downloading an application, see the TriStation 1131 Developer’s Guide.

　　To connect a TriStation PC to an MP port using an Ethernet hub:

　　Attach at least one 10BaseT straight-through cable from an RJ-45 connector on the MP Baseplate to the hub, as shown in the figure below.

　　Using more than one cable provides redundancy for your TriStation connection. If you use only one cable during live operation, you have to unplug it and move it to another RJ-45 connector if the original connection fails.

　　Attach the network adapter card in the TriStation PC to the hub using another 10BaseT straight-through cable.

　　Connecting TriStation to a CM Port

　　If your Trident system includes a CM and you want to use a TCP/IP connection to the TriStation PC, you can connect the TriStation PC to the NET1 or NET2 port on the CM. A 10BaseT cable must be used for a NET1 connection. A 10BaseT or 100BaseTX cable can be used for a NET2 connection. On the CM Baseplate, you can attach the cable to an RJ-45 connector or to a MAU. For information about the types of MAUs you can use, see the Trident Communication Guide.

　　To connect a TriStation PC to a CM port using a cross-over cable:

　　Attach one end of a cross-over cable to a NET1 or NET2 connector on the CM Baseplate, as shown in the example below.

　　Attach the other end of the cross-over cable to the network adapter card in the TriStation PC.

　　To connect a TriStation PC to a CM using an Ethernet hub:

　　Attach one end of a straight-through cable to a NET1 or NET2 connector on the CM base plate.

　　Attach the other end of the straight-through cable to an Ethernet hub, as shown in the example below.

　　Connect the TriStation PC to the hub using another straight-through cable.

　　Connecting to Serial Ports on the MP

　　Serial ports on the MP can be used for communication as a Modbus slave. The Modbus master can be a DCS or PC. For information on configuring serial ports for Modbus communication, see the Trident Communication Guide.

　　Connecting to Serial Ports on the CM

　　Serial ports on the CM can be used for communication as a Modbus master, slave, or combination master/slave. For information on configuring serial ports for Modbus communication, see the Trident Communication Guide.

　　Configuring Output Voter Diagnostics

　　Output voter diagnostics (OVD) is a set of tests that detects failures in the output voting circuitry of DO Modules only. OVD runs without operator intervention or awareness and enables the Trident controller to continually verify its own integrity.

　　The diagnostics operate as follows: During execution, the commanded state of each point in the output circuitry is momentarily reversed on each of the output drivers, one after another. I⁄O loop-back on the module allows each microprocessor to read the output value of the point to determine whether a latent fault exists within the output circuit. If a failure occurs, replace the failed module immediately so that the fault tolerance capability remains in effect.

　　Triconex guarantees that a glitch to a load lasts less than 2 milliseconds. To ensure safety, you should analyze the sensitivity of each load device attached to the controller for proper operation. The less-than-2-millisecond glitch is tolerated well by electromechanical devices, such as relays, solenoids, and contacts. For assistance with load devices that might be sensitive to such glitches, consult a Triconex Field Service Engineer. If glitches are not tolerable in your controlled process, disable OVD using TriStation.

　　Disabling OVD on DO Modules

　　To enable and disable OVD for testing, use the appropriate system attribute in your TriStation project. Leave OVD enabled for several minutes. When testing is done, disable OVD.

　　If you disable OVD, be sure to schedule regular maintenance periods to ensure the overall integrity of the controller. During maintenance, shut down the controlled process and enable OVD. It is not necessary to cycle the outputs to On and Off states to ensure complete fault coverage.

　　Controller Verification

　　After the controller is installed and before running an application, verify that the controller is operational.

　　To verify the controller:

　　Verify that the controller is properly grounded according to directions in “Effective Grounding Methods” on page 149.

　　Remove incoming power, install I⁄O and extension bus wiring, and perform a static check of the wiring.

　　Before connecting field I⁄O wiring, apply power to each baseplate.

　　Within five minutes, verify that the green Pass indicators on the MPs and all I⁄O modules go on.

　　Connect the TriStation PC to the appropriate port on the MP.

　　Connect the field I⁄O wiring and devices.

　　Verify that all process equipment connected to the controller is disabled to prevent accidental start-up of the equipment during testing.

　　Turn on power to the controller and the TriStation PC.

　　Download the TriStation project.

　　Using the TriStation Control Panel, test all inputs and outputs.

　　To verify the connections of all I⁄O points to the field wiring, use the TriStation Control Panel.

　　With output devices disabled, use TriStation facilities to verify the application.

　　When satisfied that the application is operating properly, enable the output devices and the process equipment according to the safety requirements for your environment.

　　You have now made every effort to ensure that your Trident controller is problemfree. However, should problems arise, please call a Triconex Field Service Engineer before starting up your process-control operation.

Related product recommendations:
TRICONEX 3503E
TRICONEX 3805E
TRICONEX 3806E
TRICONEX 3902AX
TRICONEX 4210
TRICONEX 4211
TRICONEX 4329
TRICONEX 4351B
TRICONEX 4352AN
TRICONEX 4352B
TRICONEX 4400
TRICONEX 4500
TRICONEX 8311N
TRICONEX 8312
TRICONEX MP3009
TRICONEX 3501E
TRICONEX 3502E
More...

RELATED ARTICLE