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Modbus RTU Interface Module for SED2
Description
Product Part Number
Contents
Required Tools
The Modbus RTU Interface Module for SED2 enables serial communication
between a Modbus RTU and a SED2 Variable Frequency Drive (VFD).
SED2-MODBUS2
•
MicroGate II Interface module.
•
Local cable for USS communication with SED2.
•
Network cable for ModBus communication with Building Automation
controller.
•
Installation documentation.
Personal computer for configuring device prior to operation.
Configuration Kit (SED2-MODBUS2_KIT), containing:
•
External Power Supply for the MicroGate II.
•
9-pin (female) to 9-pin (female) Serial Null Modem Cable.
•
Installation documentation.
NOTE:
Both the Interface Module and the SED2 must be configured prior to
operation.
Technical Instructions
Document No. 155-767
Figure 1.
February 25, 2009
Siemens Industry, Inc.
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Related Manuals for Siemens SED2-MODBUS2
Summary of Contents for Siemens SED2-MODBUS2
- Page 1 • External Power Supply for the MicroGate II. • 9-pin (female) to 9-pin (female) Serial Null Modem Cable. • Installation documentation. NOTE: Both the Interface Module and the SED2 must be configured prior to operation. Figure 1. Siemens Industry, Inc.
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Page 2: Hardware Setup
The LOCAL port is also used for configuration and programming of the Interface Module. The NETWORK port is for connection to a network and supports RS485 (2-wire) communications. Figure 2. Interface Module Hardware. Page 2 Siemens Industry, Inc. - Page 3 SED2 drive power should be off while connecting CAUTION: the wires to the drive terminals. Figure 5. Four Wire Local Port Cable. Figure 6. SED2 Drive Cable. Figure 7. Cables Installed on Interface Module. Siemens Industry, Inc. Page 3...
- Page 4 Transmit Data Green Data onto the Modbus Network. Table 3. SED2 Communications Activity LED (LCL). For this state: LED is: To indicate: Received Data Data from the SED2. Transmit Data Green Data to the SED2. Page 4 Siemens Industry, Inc.
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Page 5: Changing The Configuration
Stop bits = 1 • Flow control = None 3. With the Programming Switch set to RUN, apply power to the Interface Module, and press the ENTER key within five seconds of startup. See Figure 9. Siemens Industry, Inc. Page 5... - Page 6 Use the UP and DOWN arrows, on the computer keyboard, to navigate to the field you want to change. Change values with the LEFT and RIGHT arrows. Save Configuration Navigate to here and press ENTER to save changes. Page 6 Siemens Industry, Inc.
- Page 7 0 to Disable the USS Watchdog timer. 100 or greater to enable the USS Watchdog P2014[0] USS telegram off time timer. NOTE: Do not set to a value from 1 to 99. P2041[0] Protocol Selection for 0 (USS Protocol) RS485 port Siemens Industry, Inc. Page 7...
- Page 8 If using the USS Watchdog timer function with the Interface Module, set P2014 to a value of 100 or greater so that accidental faults do not occur because of normal communications delays between the Interface Module and the SED2. Page 8 Siemens Industry, Inc.
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Page 9: Verifying The Installation
3. Write a value of 1 to the CMD START register to stop the drive again. The SED2 frequency can be changed at any time during this process by writing to the FREQ REF register (40003). Siemens Industry, Inc. Page 9... - Page 10 • Registers mapped to setup parameters—such as ACCEL TIME or FREQ MAX, whose values typically change only via intervention by an operator—are updated at a rate of approximately once every five seconds. Page 10 Siemens Industry, Inc.
- Page 11 40028 ACTUAL PWR 0 – 655.35 r0032 40029 TOTAL KWH 0 – 65535 r0039 40030 DC BUS VOLTS 0 – 65535 r0026 40031 REFERENCE -650.0 – 650.0 r0020 40032 RATED PWR 0 – 655.35 r0206 Page 11 Siemens Industry, Inc.
- Page 12 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2009 Siemens Industry, Inc. Siemens Industry, Inc.