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Related Manuals for Emerson Digistart CS
Summary of Contents for Emerson Digistart CS
- Page 1 User Guide Modbus Digistart 0477-0009-01 www.controltechniques.com...
- Page 2 English General Information The manufacturer accepts no liability for any consequences resulting from inappropriate, negligent or incorrect installation or adjustment of the optional parameters of the equipment or from mismatching the starter with the motor. The contents of this guide are believed to be correct at the time of printing. In the interests of commitment to a policy of continuous development and improvement, the manufacturer reserves the right to change the specification of the product or its performance, or the content of the guide without notice.
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Page 3: Table Of Contents
Grounding and shielding ..............................13 Termination resistors................................13 RS485 data cable connection .............................. 13 Remote Keypad RS485 network connection specifications ....................13 Using the Remote Keypad with Digistart CS ........................14 Programming ..................................14 Troubleshooting ................................... 15 Specifications ..............................16... -
Page 4: Introduction
Control Techniques soft starters can be controlled and monitored across an RS485 serial communication network using the Modbus RTU and AP ASCII protocols. For users requiring simple control of Digistart CS and Digistart IS soft starters using Modbus RTU or AP ASCII, the instructions below describe the installation and operation of the Modbus Module. -
Page 5: Modbus Module Connection And Configuration
RS485 connection onto Modbus network For the Modbus Module to accept serial commands, a link must be fitted across terminals CSL-DI2 on Digistart CS starters. Input links are required across terminals DI2, +24V and DI3, +24V if the Digistart IS soft starter is being operated in Remote mode. In Local mode, links are not required. -
Page 6: Network Status Led
The Modbus Module supports the following Modbus functions: • 03 Read multiple registers • 06 Write single register Modbus broadcast functions are not supported. Digistart CS soft starters (including Remote Keypad): • Read multiple registers 40003 to 40008 • Write single register 40002 Digistart IS soft starters: •... -
Page 7: Modbus Register
Description Product type read 0 to 2 Product parameter list version and version 3 to 7 4 = Digistart CS 8 = Digistart IS 40008 Multiple Serial protocol read version Pr 1A Motor Full Load Current to Digistart IS maximum... -
Page 8: Trip Codes
Trip codes Table 5-2 Trip messages Trip Trip Name Digistart CS Digistart IS Code Excess start time Motor overload (thermal model) Motor thermistor Current imbalance Frequency Phase sequence Power loss Heatsink overtemperature Motor connection Input A trip FLC too high (FLC out of range) -
Page 9: Examples
Examples Command: Start Message Starter Address Function Code Register Address Data 40002 CRC1, CRC2 40002 CRC1, CRC2 Starter status: Running Message Starter Address Function Code Register Address Data 40003 CRC1, CRC2 xxxx0011 CRC1, CRC2 Trip code: Motor overload Message Starter Address Function Code Register Address Data... -
Page 10: Ap Ascii Protocol
AP ASCII Protocol The message fragments used to communicate with the Modbus Module as an AP ASCII slave device are shown below. The message fragments may be assembled into complete messages as described in the sections that follow. Data must be transmitted in 8-bit ASCII, no parity, one stop bit. NOTE Table 6-1 AP ASCII message fragments Message Fragment Type... -
Page 11: Status Retrieval
Status retrieval Soft starter status can be retrieved using the following format: Figure 6-2 Status retrieval format Send Send Receive address request status Possible error responses: (Invalid LRC) Master Slave (soft starter) Request ASCII Receive Status (ssss) Trip code See the trip code table. Starter status Description 0 to 3... -
Page 12: Calculating The Checksum (Lrc)
Calculating the checksum (LRC) Each command string sent to and from the starter includes a checksum. The form used is the longitudinal redundancy check (LRC) in ASCII hex. This is an 8-bit binary number represented and transmitted as two ASCII hexadecimal characters. To calculate LRC: 1. -
Page 13: Modbus Control Via Remote Keypad
Modbus Control via Remote Keypad To control a soft starter via an RS485 serial communications network using the Remote Keypad, connect the Remote Keypad to the network as described in the following sections. Grounding and shielding Twisted pair data cable with ground shield is recommended. The cable shield should be connected to the GND device terminal at both ends and one point of the site protective ground. -
Page 14: Using The Remote Keypad With Digistart Cs
Using the Remote Keypad with Digistart CS Figure 7-2 Modbus Module connections + GND - + GND - - GND + - GND + ~/+ ~/- Digistart CS Remote Keypad Modbus Module – RS485 serial port B10, B11 - 4 to 20 mA analog output... -
Page 15: Troubleshooting
Current ÷ 10 0 = off (required for Digistart CS) 1 = on (not suitable for Digistart CS) Remote Keypad Reset pushbutton is always enabled. RS485 Network reset and forced communication trip functions are always enabled. -
Page 16: Specifications
Specifications Enclosure Dimensions ........................... 35 mm (W) x 157 mm (H) x 90 mm (D) Weight ..................................... 250 g Protection ....................................IP20 Mounting Spring-action plastic mounting clips (x 2) Connections Soft starter ................................. 6-way pin assembly Network ....................5-way male and unpluggable female connector (supplied) Maximum cable size ................................