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S7810M MODBUS™ MODULE

65-0249—4

8

Table 12. ModBus™ R7999 Register Assignments.

Address 

(hex)

Register 

(dec)

Parameter Name

Bytes

Notes

009F

40160

R7999 Message Counter

Format—U16

Bits 0-2 = The Buffer Index of the oldest information from the R7999. 

(Incremented by the BC status message once a second.)

Bits 0-15 = A counter synchronized with R7999 messages.

00A0-

00A5

40161-

40166

R7999 buffer # 0

0-11

These buffers store an 8-second history of status data from the 

R7999. The oldest buffer is indicated by register 40160, bits 0-2. This 

scheme forms a circular buffer of information. A buffer will contain all 

zeros if the S7810M received bad data for the buffer time slot. See 

Table 25 for interpretation of bytes 0-11.

00A6-

00AB

40167-

40172

R7999 buffer # 1

0-11

00AC-

00B1

40173-

40178

R7999 buffer # 2

0-11

00B2-

00B7

40179-

40184

R7999 buffer # 3

0-11

00B8-

00BD

40209-

40220

R7999 buffer # 4

0-11

00BE-

00C3

40221-

40232

R7999 buffer # 5

0-11

00C4-

00C9

40233-

40244

R7999 buffer # 6

0-11

00CA-

00CF

40245-

40256

R7999 buffer # 7

0-11

Table 13. ModBus™ R7999 Register Assignments.

Address 

(hex)

Register 

(dec)

Parameter Name

Format

Notes

00D0-

015F

40209-

40352

R7999 Profile

See Table 23.

0160

40353

Fuel 1 closed endpoint

U16

0-4095

0161

40354

Fuel 1 open endpoint

U16

0-4095

0162

40355

Fuel 2 closed endpoint

U16

0-4095

0163

40356

Fuel 2 open endpoint

U16

0-4095

0164

40357

Inactive motor position

U16

0-4095

0165

40358

Registers 40353-40357 are current

U16

0-1

0166

40359

Air closed endpoint position

U16

0-4095

0167

40360

Air open endpoint position

U16

0-4095

0168

40361

FGR closed endpoint position

U16

0-4095

0169

40362

FGR open endpoint position

U16

0-4095

016A

40363

Unused

U16

016B

40364

Registers 40359-40363 are current

U16

0-1

016C-

018F

40365-

40400

R7999 Fault Information

Ref. Table 24.

0190

40401

Air Total Resistance

U16

0-4095. Air actuator feedback pot resistance.

0191

40402

Fuel 1 Total Resistance

U16

0-4095. Fuel 1 actuator feedback pot resistance.

0192

40403

Fuel 2 Total Resistance

U16

0-4095. Fuel 2 actuator feedback pot resistance.

0193

40404

FGR Total Resistance

U16

0-4095. FGR actuator feedback pot resistance.

0194

40405

Air Resistance Change

U16

0-4095. Bit 15 is a sign flag. 1 = negative, 0 = positive.

0195

40406

Registers 40401-40405 are current

U16

0-1

0196

40407

Fuel 1 Resistance Change

U16

0-4095. Bit 15 is a sign flag. 1 = negative, 0 = positive.

0197

40408

Fuel 2 Resistance Change

U16

0-4095. Bit 15 is a sign flag. 1 = negative, 0 = positive.

0198

40409

FGR Resistance Change

U16

0-4095. Bit 15 is a sign flag. 1 = negative, 0 = positive.

0199

40410-

40411

LCO Cycle Count

U32

0-1,000,000

019B

40412

Registers 40407-40411 are current

U16

0-1

019C

40413

Air Purge Preset Position

U16

0-4095

019D

40414

Fuel Purge Preset Position

U16

0-4095

Summary of Contents for ModBus S7810M

Page 1: ...t of a 7800 SERIES Relay Module FEATURES Multi dropped communications bus interface Remote control capabilities Standby Hold Drive to High Fire Drive to Low Fire Reset Ability to remotely mount a Keyboard Display Module S7810M1029 meets Gastec approval cannot be reset through data highway SPECIFICATIONS Model S7810M ModBus Module Electrical Ratings Voltage and Frequency 13 Vdc peak full wave recti...

Page 2: ...ply with the limits for a Class B computing device pursuant to Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against such interference when operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case users at their own expense will be required to take whatever measures may be required t...

Page 3: ...2 1 7800 SERIES RELAY MODULE 8 7 6 5 4 3 2 1 7800 SERIES RELAY MODULE INPUT OUTPUT GND GND 1 2 3 4 5 A B C MOMENTARY PUSHBUTTON SWITCH S7800 REMOTE KEYBOARD DISPLAY MODULE S7830 EXPANDED ANNUNCIATOR A B C R7999 CONTROLINKS CONTROLLER RS 485 REPEATER A WITHOUT RS 485 REPEATER LOCAL RS 485 COMMUNICATION BUS THE DEVICES ON THIS BUS MUST BE WIRED IN A DAISY CHAIN CONFIGURATION THE ORDER OF INTERCONNEC...

Page 4: ... for Function Codes 3 and 4 Table 5 Query Message Format for Function Code 6 Broadcast is supported by using a slave address of 00 Table 6 Response Message Format for Function Code 6 There is no response if the query was broadcast Table 7 Query Message Format for Function Code 17 NOTE See Table 20 for function code 17 response format Table 8 Exception Response Message Format Signal S7810M Terminal...

Page 5: ...ENOSE PLIERS M17650 Table 10 ModBus Register Assignments Address hex Register dec Parameter Name Read Write Format Notes 0000 40001 Burner Control BC Fault Code R U16 See Table 17 0001 40002 BC Fault String Code R U16 See Table 16 0002 40003 BC Sequence State R U16 See Table 15 valid only if Fault code 0 0003 40004 BC State String Code line 1 R U16 See Table 16 0004 40005 BC State String Code line...

Page 6: ... control command 0055 40086 BC Flame Amplifier type R U16 0 Standard 1 Unknown 2 Amplicheck or missing amplifier 3 Shutter 0056 40087 BC Purge Time R U16 Seconds 0057 0065 40088 40102 BC Diagnostics R U16 String codes indicating terminal jumper state See Table 16 There are 15 codes Not all are used for some burner controls 0066 007E 40103 40127 Unused 007F 40128 BC Remote Command W U16 Only one bi...

Page 7: ...ault 3 14 Purge Main Valve 15 Fault 4 16 Initialize 17 Post Purge 0084 40133 R7999 air position 6 7 U16 0 4095 0085 40134 R7999 active fuel position 8 9 U16 0 4095 0086 40135 R7999 fgr position 10 11 U16 0 4095 0087 40136 R7999 fuel id 3 7 U16 0 Fuel 1 1 Fuel 2 0088 0089 40137 40138 R7999 cycles 10 13 U32 008A 40139 R7999 diagnostic bits 6 8 10 12 U16 Bit Meaning 15 LCO state 14 HFP state 13 LFP s...

Page 8: ... closed endpoint U16 0 4095 0163 40356 Fuel 2 open endpoint U16 0 4095 0164 40357 Inactive motor position U16 0 4095 0165 40358 Registers 40353 40357 are current U16 0 1 0166 40359 Air closed endpoint position U16 0 4095 0167 40360 Air open endpoint position U16 0 4095 0168 40361 FGR closed endpoint position U16 0 4095 0169 40362 FGR open endpoint position U16 0 4095 016A 40363 Unused U16 016B 403...

Page 9: ...igured 1 Low Fire Hold Position the FGR Air and Fuel actuators at the Light Off Position 2 Modulate with FGR closed FGR closed Air and fuel modulating 3 Low Fire Hold with FGR closed FGR closed Air and Fuel at Light Off Position Configuration Options U16L If a Bit 1 then the option is configured Bit 0 FGR is set to follow the profile curve during purge Bit 1 Maximum Firing rate is controlled by th...

Page 10: ...Table 14 for register numbers and variables Table 14 Temperature Data Registers 7800 SERIES Sequence State Codes Sequence state codes are provided by the Burner Control Each code is translated into two string codes for displaying an associated message in two lines Each code is also translated into burner control state bits which may be used to generate and control system diagrams on an operator in...

Page 11: ...ner Control State Bits Line 1 Line 2 26 PILOT HOLD TEST RUN TEST SWITCH 77 98 4008h 27 PILOT HOLD START SWITCH 77 106 4008h 28 MAIN IGN 66 0 0010h 29 MAIN IG HOLD MANUAL OPEN SWITCH 67 72 4010h 30 RUN 95 0 0020h 31 RUN PV HOLD LOW FIRE SWITCH 96 58 4020h 32 PVHOLD IGN 96 66 4020h 33 PV HOLD PV HOLD SWITCH 96 45 4020h 34 RUN LOWFIRE TEST RUN TEST SWITCH 97 98 4020h 35 POSTPURGE 83 0 0040h 36 STATE ...

Page 12: ...h 78 RUN HOLD EA 188 Table 19 4020h 79 POSTPURGE HOLD EA 189 Table 19 4040h 80 PREIGNITION HOLD EA 190 Table 19 4080h Table 15 7800 SERIES Sequence State Codes and Associated register code values Continued cb_sqst Value 7800 SERIES Sequence State String Code Uses mm ss Burner Control State Bits Line 1 Line 2 Table 16 7800 SERIES String codes String Code String 0 blank 1 1 2 1 1 3 1 2 4 1 3 5 1 4 6...

Page 13: ...TE CONTROL Table 16 7800 SERIES String codes Continued String Code String 95 RUN 96 RUN HOLD 97 RUN LOWFIRE 98 RUN TEST SWITCH 99 RUNNING ILK 100 RUNNING ILK ON 101 RUNNING INTERLOCK 102 SAFETY CHECK 103 STANDBY 104 STANDBY HOLD 105 START 106 START SWITCH 107 START SWITCH ON 108 TEST STATE 109 VALVE CLOSURE 110 ALL SWITCHES ON 111 RESET ALARM TEST 112 Run Test Switch RUN 113 Run Test Switch TEST 1...

Page 14: ...HOLD EA 190 PREIGNITION HOLD EA Table 16 7800 SERIES String codes Continued String Code String Table 17 7800 SERIES Fault Codes Fault Code Reg 40001 Fault Message NOTE FAULT n is not in the Fault and Strings Code Fault String Code Table 16 0 Blank no fault 0 1 FAULT 1 NO PURGE CARD 73 2 FAULT 2 AC FREQUENY NOISE 8 3 FAULT 3 AC LINE DROPOUT 9 4 FAULT 4 AC FREQUENCY 7 5 FAULT 5 LOW LINE VOLTAGE 60 6...

Page 15: ...A 16 Table 17 7800 SERIES Fault Codes Continued Fault Code Reg 40001 Fault Message NOTE FAULT n is not in the Fault and Strings Code Fault String Code Table 16 166 FAULT 30q AUX INTERLOCK 4EA 15 167 FAULT 30p AIRFLOW SWITCHEA 13 168 FAULT 30o LOW GAS PRESSUREEA 59 169 FAULT 30n HIGH GAS PRESSUREEA 41 170 FAULT 30m ATOMIZING SWEA 14 171 FAULT 30k LOW OIL TEMPEA 62 172 FAULT 30j HIGH OIL TEMPEA 44 1...

Page 16: ...21s OTHER INTERLOCKSEA 74 237 FAULT 21r AUX INTERLOCK 5EA 16 238 FAULT 21q AUX INTERLOCK 4EA 15 239 FAULT 21p AIRFLOW SWITCHEA 13 240 FAULT 21o LOW GAS PRESSUREEA 59 241 FAULT 21n HIGH GAS PRESSUREEA 41 242 FAULT 21m ATOMIZING SWEA 14 243 FAULT 21k LOW OIL TEMPEA 62 244 FAULT 21j HIGH OIL TEMPEA 44 245 FAULT 21i LOW OIL PRESSUREEA 61 246 FAULT 21h HIGH OIL PRESSUREEA 43 247 FAULT 21g BOTH FUELS SE...

Page 17: ...ILK 4 15 0xx 10011 Aux ILK 5 16 0xx 10100 All Switches On or Other PII if hold or lockout condition exists 110 75 0x1 XXXX Valve Closure 109 00XX XXXX Oil Select N A 01XX XXXX Gas Select N A If the BC is in Standby and the 5LSB value is 1 16 then the cause of the Standby Hold is the 5LSB value otherwise the hold is Circuit Fault Table 19 Expanded Annunciator First Out Code Continued EA Status Valu...

Page 18: ...text enumeration as R7999 Status Message 0x0C byte 5 Register 40132 4 Not implemented U16H 1 6 Unused U16L 255 5 Data in the previous 5 registers is current U16 0 1 Table 25 R7999 Status Message Byte s Description R7999 circular buffer data structure of registers 40161 40208 Some of this data is interpreted by the S7810M and is available in registers 40129 40144 0 Program Mode Selected Fuel Bits D...

Page 19: ...4 FGR Pot Feedback 0x45 Air Wiper Resistance 0x46 F1 Wiper Resistance 0x47 F2 Wiper Resistance 0x48 FGR Wiper Resistance 0x49 Air Total Resistance 0x51 F1 Total Resistance 0x52 F2 Total Resistance 0x53 FGR Total Resistance 0x58 Stuck Reset 0x61 Initiate Timeout 0x67 Fuel Off Curve 0x68 FGR Off Curve 0x69 Air Off Curve 0x71 Air Offline 0x72 F1 Offline 0x73 F1 Offline 0x74 FGR Offline 0x82 Motor Spe...

Page 20: ...e North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 4Z9 Printed in U S A on recycled paper containing at least 10 post consumer paper fibers Contact Esys for more information about this product Esys The Energy Control Company website http www esys us 4520 Stine Road Ste 7 Bakersfield CA 93313 661 833 1902 email esys us ...

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