Emerson E2 Control Techniques Drive, Copeland Discus with Core- Sense Diagnostics ISD

above may communicate with IMC/Prodigy rooftop units equipped with IMC/Prodigy control boards version M4-1 or higher. E2 controllers version 2.30F01 and above may use any of the RS485 I/O ports (COM2, COM4, or COM6) as a IMC/Prodigy communication port. Version 2.21F01 E2 units may only connect IMC/Prodigys to an RS485 Expansion Card. Connectivity to IMC/Prodigy is a licensed feature and must be purchased from Retail Solu- tions.

The IMC/Prodigy interface has its own technical bulle- tin explaining installation, network setup, and E2 configu- ration. Refer to Technical Bulletin 026-4117.

6.3ECT MODBUS

E2 controllers version 2.30F01 or greater may select ECT MODBUS as a network type. The E2 communicates with MODBUS devices including but not limited to Con- trol Link CD, Control Link RSC, and Control Link ACC.

The Control Link products have their own documents explaining device configuration, networking, and E2 setup:

•026-4600 - Control Link RSC Installation Instruc- tions

•026-4601 - Control Link CD Installation Instruc- tions

•026-4703 - Control Link ACC Installation Instruc- tions

•026-4602 - Control Link ECT MODBUS Network- ing to E2s (covers MODBUS installation for all Control Link models)

6.3.1Control Techniques Drive

(VSD)

Using the MODBUS network type, E2 controllers can communicate with the Control Techniques variable-speed drive (VSD). There are three different VSD models the E2 communicates with: Commander SE, Commander SK, and Unidrive SP drive types.

Note that all CT drives are 2 stop bits, with no parity. Since ECT MODBUS specifies 1 stop bit, CT drives will configure the General Services setting for stop bits and always communicate with the drives using 2 stop bits. The E2 calculates the difference and adjusts for the additional stop bit.

Configure the COM port the CT drive will connect to by pressing Alt + M to open the serial configuration man- ager. Set the COM port to MODBUS and the baud rate (match the baud rate on the CT drive). For more informa- tion on setting up serial ports, go to Section 5, Serial Con-

figuration.

The Control Techniques VSD has its own technical bulletin that explains interfacing with E2 (P/N 026-4122). The installation and operation manual explaining the VSD is maintained by Control Techniques. Contact your Con- trol Techniques representative for a copy of this manual.

6.3.2Copeland Discus with Core- Sense Diagnostics (ISD)

E2 controllers version 2.21F01 and above may com- municate with Copeland ISD compressors using the ECT MODBUS network. E2 controllers version 2.30F01 and above may use any of the RS485 I/O ports (COM2, COM4, or COM6) as a Copeland ISD communication port. Version 2.21F01 E2 units may only connect Cope- land ISD compressors to an RS485 Expansion Card.

The installation and operation manual explaining the Copeland ISD interface is maintained by Copeland. Con- tact your Copeland representative for a copy of this man- ual.

6.3.3XR35CX, XR75CX, and

XEV22 Case Controllers

E2 controllers version 2.84 or greater communicate with the XR and XEV controllers. The XR and XEV con- trol compressor regulation, defrost, light, and evaporator fans in refrigeration systems on normal, low, or medium temperatures, control a wide variety of stepper electronic expansion valves and anti-sweat heaters (if present), and measure and regulate the superheat of the refrigerant in the system.

If the case controller is configured with a Real Time Clock (RTC), it can be programmed with up to 6 daily defrosts and an energy saving function. Without the RTC, the E2 can coordinate defrost cycles and the energy-saving function.

Several parameters of the Emerson controllers (such as inputs, outputs, setpoints, and alarms) can be configured directly in E2 and sent to the appropriate Emerson control- ler, depending on the controller model.

6.3.3.1XR75CX-Case Display

E2 controllers version 3.02 or greater communicate

with the XR75CX-Case Display controller. The XR75CX- Case Display is a microprocessor-based controller, suit- able for applications on medium or low temperature venti- lated refrigeration units. It has up to four (4) analog inputs: discharge air temperature, product temperature, defrost temperature and coil out temperature, four (4) relay out- puts, and up to two (2) digital inputs. For more informa- tion on the XR75CX-Case Display, refer to the XR75CX-

6-6 • E2 RX/BX/CX I&O Manual 026-1610 Rev 13 14-SEP-2011