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Summary of Contents for CS Instruments DS 350
- Page 1 DS 350/330 ICOM DS 350/330 industrial communication manual DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 2 1.1 RS-485 with Modbus/RTU Modbus is a popular industry bus which can be used to connect several DS 350/330 to a Modbus- Master which could be a PLC or a SCADA system or a DS 350/330 Master.
- Page 3 To connect DS 350/330 to a Profibus-master CS offers a gateway from CSBus to Profibus. De- pending on the number of sensors connected to DS 350/330, between 4 to 10 DS 350/330 can be routed to the Profibus. Profibus provides functionality to retrieve measurement values.
- Page 4 DS 350/330 ICOM 1.4 Modbus/RTU over TCP (Ethernet) DS 350/330 is available with a Ethernet port. By selecting the Modbus over TCP protocol from the DS 350/330 menu, the communication with a Modbus master can be established. This is a popu- lar way to connect to a Modbus Master through Ethernet.
- Page 5 CSM-S can communicate through Ethernet and RS-485. It can detect up to 10 DS 350/330 but only one DS 350/330 can be selected to communicate at a time. The user has to select from a list of DS 350/330. Through the Ethernet and RS-485 connection the full functionality of CSM-S is available, for the user it appears as if the device is connected directly to the local USB-Port.
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Page 6: Hardware Requirements
2-wire cable. If further distance is required, a repeater can be installed to reach another 1000 m. Up to 30 DS 350/330 instruments can be connected to the RS-485 network. Please en- sure that CSBus protocol is selected on DS 350/330 menu and every DS 350/330 has a unique device address (1 - 255), (see software CSC-350). - Page 7 Ethernet. Through the RS-485 / Ethernet gateway the link to Ethernet is estab- lished. The gateway can handle up to 30 DS 350/330. Please ensure that CSBus protocol is se- lected on DS 350/330 menu and every DS 350/330 has a unique device address (1 - 255).
- Page 8 The Main-Device itself then can be connected to a next higher level Master Device ei- ther through RS-485 or Ethernet. The Master-Device on top sees only the main device, which provides all measurement channels from the sub-devices. DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 9 Connect Ethernet cable and mount bend protection sleeve Ethernet cable: An Ethernet cable with category 5 or better is applicable and the maximum cable length is 100 meter between DS 350/330 and the connected HUB or computer. DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 10 RS485, DS 350/330 provides loop-through pins for connecting to next device on the network. RS485 network requires a termination resistor network. At the last device in the network the DIP switch must be set to the ON position, all other DS 350/330 re- main in OFF position.
- Page 11 Screening: Cu shielding braid or shielding braid and shielding foil 3. Settings on DS 350/330 All device settings of DS 350/330 can be done in a convenient way through the configuration soft- ware CSC-350 (see chapter 4.). There are many settings available, but the focus here is on the Flied-bus Interface settings.
- Page 12 Use the following IP…. Enter the fix IP address here Please also consider, that only one software can communicate with the DS 350/330, it’s not possible to start multiple software form different PC at the same time. This also applies to Modbus, where only one Modbus-master can communicate at the same time.
- Page 13 DS 350/330 ICOM Printing the Modbus slave register table After the configuration of a DS 350/330 is finished, one of the final steps is to print the Modbus register table. This table describes all Modbus register addresses and it’s measurement value contents.
- Page 14 DS 350/330 ICOM DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
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Page 15: Installation Of Software
4. Installation of Software Following software is available for download from the company web page www.csinstrument.com: CSC-350 Configuration software for DS 350 / 330 / 320 CSM-S Single device data acquisition and analyzes software CSM-M Multiple device data acquisition and analyzes software After downloading of the files, please follow the instructions of the installation software. - Page 16 DS350/330 found in the RS-485 network. Choose the one you want to connect, then click 'Select'. Please note: CSM-S can only connect to one DS 350/330 at a time. CSM-M can connect to several DS 350/330 at the same time. RS-485 device list dialog...
- Page 17 Select “Device —-> Go online” to show online measurement as shown above. Press and hold the left mouse button, drag the mouse and move the meter windows to proper location, release the mouse to confirm moving. DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 18 Check if PC and DS 350/330 are on the same subnet. • Check if there exists a device or PC which has same IP address as the DS 350/330. • Make sure firewall settings on PC doesn't block DS 350/330 communication which uses port 6789.
- Page 19 • Check the USB-RS485 converter has correct cable connection to the net work. • Check each DS 350/330 has an unique address set. Communication is not stable or lost during online reading • Check to ensure that only the last device on the RS 485 network has it’s termination resistor network switched on.
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Page 20: Appendix A - Modbus Communication Example
1 byte Coil address Lo 1 byte Coil address Lo 1 byte Data Hi 1 byte Data Hi 1 byte Data Lo 1 byte Data L 1 byte 2 bytes 2 bytes DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060... - Page 21 Function code 1 byte Function code 1 byte 2 bytes Byte count 1 byte Slave ID 2 bytes Device run indicator 2 bytes Product code 2 bytes Product name 20 bytes 2 bytes DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 22 /* LRC char initialized */ while (usDataLen––) /* pass through message buffer */ uchLRC += *auchMsg++ ; /* add buffer byte without carry */ return ((unsigned char)(–((char)uchLRC))) ; /* return twos complement */ DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 23 For example, if the CRC value is 1241 hex (0001 0010 0100 0001): Addr Func Data count Data Data Data Data CRC Lo CRC Hi 0x41 0x12 DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 24 /* pass through message buffer */ uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC */ uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ; uchCRCLo = auchCRCLo[uIndex] ; return (unsigned short int)((uchCRCHi << 8) | uchCRCLo); DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
- Page 25 DS 350/330 ICOM 8.3 APPENDIX B – Exception codes The DS 350/330 Modbus module uses the following exception codes, when responding to the master. Exception code Exception name 0x01 illegal function 0x02 Illegal data address 0x03 Illegal data value 0x04...
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Page 26: Appendix E - Float Definition
8.5 APPENDIX E – Float definition 32-bit floating-point format The DS 350/330 Modbus module IEEE ‘Little-Endian’ representation for addresses and data items. This means that when a numerical quantity larger than a single byte is transmitted, the Least significant byte is sent first. -
Page 27: Order Information
DS 350/330 ICOM Order information Order no. Description For Field bus connection include one of these options in DS 350/330 A1631 2 inputs for CS flow / dew points sensors + RS-485 A1632 2 inputs for CS flow / dew points sensors + Ethernet... - Page 28 Email: sales@csinstrument.com.my Website: http://www.csinstrument.com Kuala Lumpur Office No.1, Jalan TP3, UEP Subang Jaya Industrial Estate, 47620 Subang Jaya, Selangor, Malaysia Tel: +603 5122 2082 Fax: +603 5122 5811 Email: sales@csinstrument.com.my Website: http://www.csinstrument.com DS 350/330 ICOM English, V1.2, 17.12.12 0970 0060...
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