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HRX-OM-Q033

Chapter 4 MODBUS communication function

HRSH 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 HRSH Series

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: ...2 16 2 5 2 External switch signal input 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 Connecte...

Страница 4: ...for communicating 5 2 5 1 3 Precautions 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 Setti...

Страница 5: ...HRX OM Q033 Contents HRSH Series 6 3 2 Setting and checking 6 3...

Страница 6: ......

Страница 7: ...rol of run start of the product temperature setting and details of product condition and alarm condition can be obtained Simple communication protocol Serial communication RS 485 RS232C enables remote...

Страница 8: ...is the same as that of LOCAL The REMOTE lamp on the operation panel turns off SERIAL Mode allowing the product to be operated by serial communication MODBUS simple communication protocol can be selec...

Страница 9: ...back of the product is used for communication Fig 1 2 1 Communication port shows the location of the communication port Fig 1 2 1 Communication port Contact input output DIO Connector for communicatio...

Страница 10: ...eset Key click sound Temperature unit Pressure unit Alarm The latest Alarm Alarm display menu Alarm The oldest PV SV PV SV PV SV Note It changes only when the alarm is generated PV SV PV SV Power supp...

Страница 11: ...gnal 2 Contact input signal 2 type Contact output signal 1 function Contact output signal 1 operation Contact output signal 1 selected alarm Digital output signal 2 function Contact output signal 3 se...

Страница 12: ...lay time 0 Communication range RW Contact input output communication Contact input signal 1 RUN 2 4 Contact input signal 1 type ALT Contact input signal 1 delay timer time delay of reading 0 Contact i...

Страница 13: ...ignal 3pcs Type of signal signal operation N O type N C type 2 1 Precautions for communication 2 1 1 Precautions wiring communication Communication wiring A communication cable that connects the produ...

Страница 14: ...he terminal block of the contact input output communication The communication cable that connects the product and customer system is not included with the product Prepare a cable referring to Table 2...

Страница 15: ...gnal 2 Alarm status signal output Run stop signal input Operation status signal output Remote status signal output Thermo chiller side Cuctomer s equipment side Signal description Default setting 1 1...

Страница 16: ...ading Sets the delay timer of reading of contact input signal 2 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 S...

Страница 17: ...ssing the key until the setting screen for communication mode appears on the digital display 2 Select LOC from the key and confirm by pressing SEL Table 2 4 2 List of set values Set values Explanation...

Страница 18: ...hen the setting of the communication mode is DIO mode External switch signal input cannot be set 2 When the setting of the communication mode is SEIRAL mode and the protocol setting is Simplified comm...

Страница 19: ...t 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 Setting...

Страница 20: ...al input N C type Remote signal input 1 1 When the setting of the serial protocol is Simplified communication protocol 2 Remote signal input cannot be set Contact input signal 2 type Setting and check...

Страница 21: ...signal 2 is external switch signal input N O type or N C type 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...

Страница 22: ...stop alarm signal output Operation continuation alarm signal output Alarm status signal output Selected alarm status signal output Operation start timer setting status signal output Operation stop ti...

Страница 23: ...reen of digital output 1 selected alarm is displayed on the digital display 24 Select contact output 1 selected alarm from the table below with key or key and confirm by pressing SEL Table 2 4 13 List...

Страница 24: ...ut Operation stop timer setting status signal output Recovery from power failure setting status signal output Anti freezing setting status signal output Contact input signal 1 pass through signal outp...

Страница 25: ...ected 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 available unl...

Страница 26: ...ut Operation stop timer setting status signal output Recovery from power failure setting status signal output Anti freezing setting status signal output Contact input signal 1 pass through signal outp...

Страница 27: ...s 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 Set ra...

Страница 28: ...ut N C SW_B Alternate ALT Used Used Without signal input OFF Contact input signal 2 Run stop signal input RUN Alternate ALT Momentary MT External switch signal input N O SW_A Alternate ALT Used Used E...

Страница 29: ...type has been turned off for the time set for OFF detection timer it is recognized as OFF The factory default setting of the OFF detection timer is 0sec Refer to 1 4 2 for setting AL32 contact input...

Страница 30: ...ternal switch signal input 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 extern...

Страница 31: ...ignals 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 power is not supp...

Страница 32: ...tus signal output N O type When run timer is set signal turns ON N C type When run timer is set signal turns OFF OF TM Operation stop timer setting status signal output N O type When stop timer is set...

Страница 33: ...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 Please prepare a...

Страница 34: ...In the latter case up to 31 products can be connected Both ends of the communication connection the end nodes need to be connected to the higher level computer The terminal resistance of this product...

Страница 35: ...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 36: ...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 37: ...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 communica...

Страница 38: ...SEL 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 Simple communication protocol 2 and...

Страница 39: ...ng and checking 5 Press the SEL key once The set screen of communication specification is displayed on the digital display 6 Select communication specification from the table below with key or key and...

Страница 40: ...fault setting Setting checking are not available unless the serial protocol setting is MODBUS to Setting of slave address for MODBUS Set range is 1 to 99 Communication speed MODBUS Setting and checkin...

Страница 41: ...sitive 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 42: ...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 Functi...

Страница 43: ...ode 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 Informa...

Страница 44: ...upported 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 compare...

Страница 45: ...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 46: ...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 47: ...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 48: ...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 49: ...ave 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 spe...

Страница 50: ...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 51: ...h Reserved 000Bh Circulating fluid set temperature 5 0 to 35 0 o C 32h to 15Eh 0 1 o C dig R W 41 0 to 95 0 o F 3B6h to 410h 0 1 o F dig 000Ch Reserved 1 000Dh Reserved 000Eh Reserved 000Fh Reserved 1...

Страница 52: ...unit set status 0 MPa 1 PSI 5 Remote status flag Remote status 0 Other than SERIAL mode 1 SERIAL mode 6 Unused 7 Warming up function flag Function status 0 Not set 1 Set 8 Anti snow coverage function...

Страница 53: ...circulating fluid discharge pressure rise 8 Circulating fluid discharge pressure drop 9 High compressor suction temp 10 Low compressor suction temp 11 Low super heat temperature 12 High compressor di...

Страница 54: ...12 Compressor breaker trip 2 13 Compressor inverter error 14 Pump breaker trip 2 15 Pump inverter error Alarm flag 4 0 Air exhaust fan stoppage 3 1 Unused 2 Unused 3 Unused 4 Unused 5 Unused 6 Unused...

Страница 55: ...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 56: ......

Страница 57: ...l 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...

Страница 58: ...resend 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 req...

Страница 59: ...s 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 add...

Страница 60: ...col 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 serial proto...

Страница 61: ...m with SEL Table 5 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 Simple communication protoco...

Страница 62: ...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 63: ...ailable unless the serial protocol setting is simple communication protocol to Setting of slave address for simple communication protocol Set range is 1 to 99 Communication speed simple communication...

Страница 64: ...fault 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 checking...

Страница 65: ...itial 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 protocol Se...

Страница 66: ...re not available unless the serial protocol setting is simple communication protocol to Setting of response delay time Set range is 0 to 250m sec Communication range simple communication protocol Sett...

Страница 67: ...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 No response...

Страница 68: ...Command 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 m...

Страница 69: ...in 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 70: ...e 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 disch...

Страница 71: ...rculating 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 oper...

Страница 72: ...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 73: ...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 74: ...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 me...

Страница 75: ...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 76: ...ng 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 77: ...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 exam...

Страница 78: ...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 79: ...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 80: ...the communication alarm function and default values Table 6 3 1 Communication setting item Display Item Contents Default setting Changing of communication error Set the operation when the alarm No AL1...

Страница 81: ...digital display 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 Set values Explanation Initial...

Страница 82: ...tion 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 th...

Страница 83: ......

Страница 84: ...AN Tel 81 3 5207 8249 Fax 81 3 5298 5362 URL https www smcworld com Note Specifications are subject to change without prior notice and any obligation on the part of the manufacturer 2019 SMC Corporati...

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