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HRX-OM-M091

Chapter 4 MODBUS communication function

HRS Series

4.1 Precautions for communication

4-1

Chapter 4 MODBUS communication

function

MODBUS protocol is a communication protocol developed by Modicon. It is
used to communicate with a PC or PLC.

This communication has the following features.

・

Controls run/stop.

・

Sets and reads the circulating fluid set temperature.

・

Reads the circulating fluid discharge temperature.

・

Reads the condition of the product.

・

Reads the alarm generating condition of the product.

Refer to “4.10 Register Map” for the register of the product.

4.1 Precautions for communication

4.1.1

Precautions after wiring and before communication

○

Check or set the each communication setting by the operation display
panel.

・

The communication specification shall be the customer’s communication

standard.

・

The serial protocol shall be the MODBUS.

・

The communication mode shall be the SERIAL mode.

Other modes can perform reading, but only SERIAL mode can perform
writing.

○

Check or set the communication parameters using the operation display

panel.

Check or set the communication speed so that the product synchronizes with
the host computer (master) prepared by the customer.

○

Check the slave address by the operation display panel.

No response is returned when a request message is sent from a slave
address other than those set in the product.

Содержание HRS012-W

Страница 1: ...mo chiller Air Cooled refrigerated type Water Cooled refrigerated type HRS012 A 10 HRS012 W 10 HRS018 A 10 HRS018 W 10 HRS012 A 20 HRS012 W 20 HRS018 A 20 HRS018 W 20 HRS024 A 20 HRS024 W 20 HRS050 A...

Страница 2: ...n and operation of the product Only people who understand the basic operation of the product through this manual or who performs installation and operation of or have basic knowledge about industrial...

Страница 3: ...5 2 Signal of the external switch 2 18 2 6 Contact output signal 2 19 Chapter 3 Serial communication 3 1 3 1 Precautions wiring communication 3 1 3 2 Communication specification 3 1 3 3 Connected expl...

Страница 4: ...ns after the completion of the communication 5 2 5 2 Communication specification 5 3 5 3 Setting and checking 5 4 5 3 1 Setting and checking items 5 4 5 3 2 Setting and checking 5 5 5 4 Communication...

Страница 5: ...he product temperature setting and details of product condition and alarm condition can be obtained Serial communication Simple communication protocol Serial communication RS 485 RS232C enables remote...

Страница 6: ...OTE lamp on the operation panel turns on DIO DIO LOCAL Operation control of the product is the same as that of LOCAL The REMOTE lamp on the operation panel turns off SERIAL Mode allowing the product t...

Страница 7: ...1 2 1 Fig 1 2 2 shows the location of the communication port Fig 1 2 1 Communication port HRS012 HRS018 HRS024 20 Fig 1 2 2 Communication port HRS050 20 Contact input output DIO Connector for communic...

Страница 8: ...SV PV SV PV SV Key lock Run timer Setting menu Stop timer READY mode READY band width READY time Offset mode Offset temperature Recover from power failure Anti freezing PV SV PV SV PV SV PV SV PV SV...

Страница 9: ...i on speed MODBUS Slave address Simple communicatio n protocol Communication speed Simple communication protocol Response delay time Simple communication protocol Communicati on range Simple communica...

Страница 10: ...ime 0 Serial communication Simple communication protocol Communication range RW 5 3 Contact input signal 1 RUN Contact input signal 1 type ALT Contact input signal 1 delay timer time delay of reading...

Страница 11: ...onnects the product and customer system is not included with the product Please prepare a cable referring to 2 3 Terminal block explanation The connector is included In order to avoid malfunction do n...

Страница 12: ...f the contact input output communication A communication cable that connects the product and customer system is not included with the product Prepare a cable referring to Table 2 3 1 and Fig 2 3 1 Use...

Страница 13: ...iring of the external switch NPN open collector output Example Fig 2 3 4 Wiring of the external switch PNP open collector output Example Terminal no 1 Terminal no 12 Wire the communication cable to th...

Страница 14: ...act input output communication Used when the setting of the contact input signal 2 is SW_A or SW_B is displayed when the setting of the contact input signal 2 is not SW_A or SW_B Contact input signal...

Страница 15: ...sing the key until the setting screen for communication mode appears on the digital display PV SV PV SV PV SV PV SV PV SV 2 Select LOC from the key and confirm by pressing SEL PV SV Table 2 4 2 List o...

Страница 16: ...3 When the setting of the communication mode is DIO mode External switch signal cannot be set 4 When the setting of the communication mode is SEIRAL mode and the protocol setting is Simplified commun...

Страница 17: ...input signal 1 is external switch signal input N O type or N C type to Setting of contact input signal 1 delay timer of reading Set range is 0 to 300 sec Contact input signal 1 OFF detection timer Se...

Страница 18: ...l switch signal input N C type Remote signal 6 6 When the setting of the serial protocol is Simplified communication protocol 2 Remote signal cannot be set Contact input signal 2 type Setting and chec...

Страница 19: ...setting to Setting of contact input signal 2 delay timer of reading Set range is 0 to 300 sec Contact input signal 2 OFF detection timer Setting and checking 17 Press the SEL key once The set screen o...

Страница 20: ...utput Signal for completion of preparation TEMP READY Signal for the status of the operation stop alarm is output Signal for the status of the operation continue alarm is output Signal for the alarm s...

Страница 21: ...reen of digital output 1 selected alarm is displayed on the digital display PV SV 24 Select contact output 1 selected alarm from the table below with key or key and confirm by pressing SEL Table 2 4 1...

Страница 22: ...or the alarm status is output Signal for selected alarm status is output Signal for Run timer set status is output Signal for Stop timer set status is output Signal for the recovery from power failure...

Страница 23: ...2 selected alarm from the table below with key or key and confirm by pressing SEL Table 2 4 16 List of set values Set values Explanation Initial value Default setting Setting checking are not availab...

Страница 24: ...or the alarm status is output Signal for selected alarm status is output Signal for Run timer set status is output Signal for Stop timer set status is output Signal for the recovery from power failure...

Страница 25: ...values Set values Explanation Initial value Default setting Setting checking are not available unless the function setting of contact output 1 is selected alarm status signal to Sets selection alarm S...

Страница 26: ...N C SW_B Alternate ALT Used Used Contact input signal 1 Without intput signal OFF Alternate ALT Run stop signal RUN Momentary MT External switch signal input N O SW_A Alternate ALT Used Used External...

Страница 27: ...user is turned on It reads the signal of the external switch signal N O type after the time which has been set for the delay timer of reading The factory default setting of the delay timer of reading...

Страница 28: ...itch CLOSE OPEN Operation start Signal reading start Delay timer of reading OFF detection timer Alarm generation Operation stops due to the alarm Fig 2 5 1 Timing chart of external switch monitoring D...

Страница 29: ...ed off open The signals can be customized depending on the customer s application The Table 2 6 2 shows operation of contact output signal Tips All contact output signals are turned off open when the...

Страница 30: ...en the selected alarm goes off N O type The signal is turned ON when the run timer is set ON TM Signal for operation start timer setting N C type The signal is turned OFF when the run timer is set N O...

Страница 31: ...ter 4 and 5 illustrate each protocol 3 1 Precautions wiring communication Communication wiring A communication cable that connects the product and customer system is not included with the product Plea...

Страница 32: ...esistance Master This product first slave 1 SD 5 SG 9 SD This product second slave 1 SD 5 SG 9 SD This product 31st slaves Terminal resistance120 Fig 3 3 1 RS 485 connector connection Tips 1 master 1...

Страница 33: ...the register of the product 4 1 Precautions for communication 4 1 1 Precautions after wiring and before communication Check or set the each communication setting by the operation display panel The co...

Страница 34: ...of circulating fluid temperature When the circulating fluid set temperature is written by communication the data is stored in FRAM When the product restarts it restarts with the value which was set b...

Страница 35: ...ue Default setting Communication mode Sets communication mode of this product LOC Serial protocol Sets serial communication protocol MDBS Communication specification Sets standard of the serial commun...

Страница 36: ...ith the key and confirm with SEL PV SV Table 4 3 2 List of set values Set values Explanation Initial value Default setting Sets LOCAL mode Sets DIO mode Sets SERIAL mode 1 1 If the serial protocol is...

Страница 37: ...ng and checking 5 Press the SEL key once The set screen of communication specification is displayed on the digital display PV SV 6 Select communication specification from the table below with key or k...

Страница 38: ...value Default setting Setting checking are not available unless the serial protocol setting is MODBUS to Sets of slave addresses for MODBUS Set range is 1 to 99 Communication speed MODBUS Setting and...

Страница 39: ...itive response Based on the request message reads register writes register and returns a positive response Negative response Returns a negative message when the received request message is not normal...

Страница 40: ...message 3Ah 2 Slave Address 1 to 99 3031h to 3939h This is a number to identify this product 1 is the default setting This can be changed by the operation display panel 3 Function Refer to 4 6 Functio...

Страница 41: ...de Contents Code Contents 01 Slave Address 01 Slave Address 03 Function 03 Function 0000 Head address of specified register 02 Quantity of bytes to read 0001 Quantity of register to read 00EE Informat...

Страница 42: ...pported 4 7 LRC LRC checks the content of the message other than of START and CR LF of END The sending side calculates and sets The receiving side calculates based on the received message and compares...

Страница 43: ...onsecutive data from register 0000h Read circulating fluid discharge temperature circulating fluid discharge pressure status information alarm information Request message Response message Code Content...

Страница 44: ...Function Data LRC End XX XX 0 6 XX XX CR LF Write Address Write Data Hi Lo Hi Lo XX XX XX XX XX XX XX XX Communication example Slave Address No 1 Write data to register 000Ch Commands to run Request m...

Страница 45: ...Address Quantity to Write Hi Lo Hi Lo XX XX XX XX XX XX XX XX Communication example Slave Address No 1 Write two consecutive data from register 000Bh Commands to change of circulating fluid set temper...

Страница 46: ...aneously Request message Normal Master to Slave Start Slave Address Function Data LRC End XX XX 1 7 XX XX CR LF Read Address Quantity to Read Write Address Quantity to Write Hi Lo Hi Lo Hi Lo Hi Lo XX...

Страница 47: ...ve Address 17 Function 17 Function 0004 Head address of specified register 06 Quantity of byte to read 0003 Quantity of register to read 0000 Information of 0004h Status flag 000B Head address of spec...

Страница 48: ...s 80h in ASCII code 2 Error Code Assign error code below 01 Function code of a command is outside the standard 02 The specified address of register is outside the range 03 Data field of a command is n...

Страница 49: ...d R 5 0 to 40 0 o C 32h to 190h 0 1 o C dig 000Bh Circulating fluid set temperature 41 0 to 104 0 o F 19Ah to 410h 0 1 o F dig 000Ch Reserved 1 000Dh Reserved 000Eh Reserved 000Fh Reserved R W 1 Comma...

Страница 50: ...Unit flag Pressure unit set status 0 MPa 1 PSI 5 Remote status flag Remote status 0 Other than SERIAL mode 1 SERIAL mode 6 Unused 7 Unused 8 Unused 9 Completion of preparation TEMP READY flag Completi...

Страница 51: ...ure drop 9 High compressor intake temp 10 Low compressor intake temp 11 Low super heat temperature 12 High compressor discharge pressure 13 Unused 14 Refrigerant circuit pressure high pressure side dr...

Страница 52: ...I level drop 3 DI sensor error 4 Unused 5 Unused 6 Unused 7 Unused 8 Unused 9 Unused 10 Unused 11 Unused 12 Unused 13 Unused 14 Unused Alarm flag 3 15 Unused Alarm given off status 0 Not occurred 1 Oc...

Страница 53: ...ture unit C or F during SERIAL mode If the temperature exceeds the upper limit of the circulating fluid set temperature range the circulating fluid set temperature is changed to the upper limit value...

Страница 54: ...HRX OM M091 Chapter 4 MODBUS communication function 4 10 Register Map HRS Series 4 22...

Страница 55: ...be the simple communication protocol 1 or 2 Simple communication protocol 1 Operation display panel controls the start and stop of the product Simple communication protocol 2 Controls the start and s...

Страница 56: ...esend the request message If necessary send a read request message to check if it was written correctly Message to notify the completion of the process is returned when the action for the written requ...

Страница 57: ...2400bps 4800bps 9600bps 19200bps Data bit length Select from 7bit 8bit Stop bit length Select from 1bit 2bit Parity Select from without parity odd number even number Letter code ASCII mode Slave addr...

Страница 58: ...erial protocol is not simple communication protocol 9 6 BCC Simple communication protocol Sets error detection code of communication of simple communication protocol is displayed when the setting of s...

Страница 59: ...below with the key and confirm with SEL PV SV Table 5 3 2 List of set values Set values Explanation Initial value Default setting Sets LOCAL mode Set s DIO mode Sets SERIAL mode 1 1 If the serial prot...

Страница 60: ...on protocol 2 is selected as the serial protocol Communication specification Setting and checking 5 Press the SEL key once The set screen of communication specification is displayed on the digital dis...

Страница 61: ...e not available unless the serial protocol setting is simple communication protocol to Sets of slave addresses for simple communication protocol Set range is 1 to 99 Communication speed simple communi...

Страница 62: ...ue Default setting Setting checking are not available unless the serial protocol setting is simple communication protocol Without BCC With BCC Data length simple communication protocol Setting and che...

Страница 63: ...ion Initial value Default setting Setting checking are not available unless the serial protocol setting is simple communication protocol None Odd number Even number Stop bit simple communication proto...

Страница 64: ...cking are not available unless the serial protocol setting is simple communication protocol to Sets of response delay time Set range is 0 to 250m sec Communication range simple communication protocol...

Страница 65: ...sponse Based on the request message reads writes return a positive response Negative response Returns a negative message when the received request message is not normal Refer to 5 9 Negative response...

Страница 66: ...ommand Writing data ETX BCC STX XX XX W XX XX XX XX XX XX XX XX ETX XX 1 3 Request message Request to store the data STX Slave Address Request Command ETX BCC STX XX XX W XX XX XX ETX XX 2 Response me...

Страница 67: ...n the received request 9 NAK 15h Negative acknowledge code This is included in the response from the product when there is an error in the received request 10 Exception code Error content is included...

Страница 68: ...Communication example Request message Response message Code Contents Code Contents 01 Slave Address 01 Slave Address R Request message to read ACK Normal response message PV1 Circulating fluid discha...

Страница 69: ...irculating fluid discharge temperature in the temperature unit of the product The circulating fluid discharge temperature offset temperature if offset setting is selected which is displayed on the ope...

Страница 70: ...Address Request Command ETX BCC STX XX XX R P V 1 ETX XX Response message Normal Slave to Master STX Slave Address ACK Command Reading data ETX BCC STX XX XX ACK P V 1 XX XX XX XX XX ETX XX Communica...

Страница 71: ...e to Master STX Slave Address ACK Command Reading data ETX BCC STX XX XX ACK S V 1 XX XX XX XX XX ETX XX Communication example Slave Address No 1 BCC selection Request message Response message Code Co...

Страница 72: ...V 1 XX XX XX XX XX ETX XX Response message Normal Slave to Master STX Slave Address ACK ETX BCC STX XX XX ACK ETX XX Communication example Slave Address No 1 BCC selection Request message Response mes...

Страница 73: ...TX XX Response message Normal Slave to Master STX Slave Address ACK Command Reading data ETX BCC STX XX XX ACK L O C XX XX XX XX XX ETX XX Communication example Slave Address No 1 BCC selection Reques...

Страница 74: ...g this product as a replacement for HRG HRGC this function is not needed Request message Normal Master to Slave STX Slave Address Request Command Writing data ETX BCC STX XX XX W L O C XX XX XX XX XX...

Страница 75: ...Normal Master to Slave STX Slave Address Request Command ETX BCC STX XX XX W S T R ETX XX Response message Normal Slave to Master STX Slave Address ACK ETX BCC STX XX XX ACK ETX XX Communication examp...

Страница 76: ...STX XX XX NAK XX ETX XX Communication example Slave Address No 1 Writing of the circulating fluid set temperature when the communication range setting is RO read only Request message Response message...

Страница 77: ...does not send messages regularly The default setting of this function is off 6 1 Communication alarm occurs Fig 6 1 1 shows when an alarm occurs Refer to 6 3 Setting and checking for the setting metho...

Страница 78: ...ring time Normal connection Communication error automatic restoration Write or read 60 sec Fig 6 2 1 Communication alarm restoration example 6 3 Setting and checking 6 3 1 Setting and checking items T...

Страница 79: ...rror is displayed on the digital display PV SV 3 Select changing of operation when communication error from the table below with key or key and confirm by pressing SEL Table 6 3 2 List of set values S...

Страница 80: ...ion error from the table below with key or key and confirm by pressing SEL Table 6 3 3 List of set values Set values Explanation Initial value Default setting Setting checking are not available if the...

Страница 81: ......

Страница 82: ...101 0021 JAPAN Tel 81 3 5207 8249 Fax 81 3 5298 5362 URL http www smcworld com Note Specifications are subject to change without prior notice and any obligation on the part of the manufacturer 2011 SM...

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