MAN-546-0002-B VHF Modbus Receiver User Manual
Contents
1. 26 4267 10AB 0 Data 4 27 4268 10AC Transmitter Address Hi 16bits 27 4269 10AD Transmitter Address Lo 16bits 27 4270 10AE 0 Transmitter Status 27 4271 10AF 0 Data 1 27 4272 10B0 Data 2 Data 3 27 4273 10B1 0 Data 4 28 4274 10B2 Transmitter Address Hi 16bits 28 4275 10B3 Transmitter Address Lo 16bits 28 4276 10B4 0 Transmitter Status 28 4277 10B5 0 Data 1 28 4278 10B6 Data 2 Data 3 28 4279 10B7 0 Data 4 29 4280 10B8 Transmitter Address Hi 16bits 29 4281 10B9 Transmitter Address Lo 16bits 29 4282 10BA 0 Transmitter Status 29 4283 10BB 0 Data 1 29 4284 10BC Data 2 Data 3 29 4285 10BD 0 Data 4 30 4286 10BE Transmitter Address Hi 16bits 30 4287 10BF Transmitter Address Lo 16bits 30 4288 10C0 0 Transmitter Status 30 4289 10C1 0 Data 1 30 4290 10C2 Data 2 Data 3 30 4291 10C3 0 Data 4 31 4292 10C4 Transmitter Address Hi 16bits 31 4293 10C5 Transmitter Address Lo 16bits 31 4294 10C6 0 Transmitter Status 31 4295 10C7 0 Data 1 31 4296 10C8 Data 2 Data 3 31 4297 10C9 0 Data 4 32 4298 10CA Transmitter Address Hi 16bits 32 4299 10CB Transmitter Address Lo 16bits 32 4300 10CC 0 Transmitter Status 32 4301 10CD 0 Data 1 32 4302 10CE Data 2 Data 3 32 4303 10CF 0 Data 4 Note All the above registers are sent as 16 bit data with the high byte sent first Big Endian e g fora pulse count of 34562dec 8702nex will be sent as 0x87 amp 0x02 212. 5 44 Code 16 Write Multiple Register 8 bit Addressing Write address 51234 ec 00C822hex into Ch1 location and clear all other locations to Slave 4 04 10 03 10 00 08 10 00 00 00 C8 00 22 00 00 00 00 00 00 00 00 00 00 35 93 where 04 Slave address 4 10 Modbus Function Code 16 03 10 First Register to Write to 00 08 Number of Registers to Write to 10 Number of bytes following 16 00 00 00 C8 00 22 00 00 Register 4 00 00 Register 5 00 00 Register 6 00 00 Register 7 00 00 Register 8 35 93 CRC 5 4 5 Code 16 Write Multiple Register 16 Bit Addressing address written into first 3 registers Write address 512344dec 00C822hex into Ch1 location and clear all other locations to Slave 4 04 10 10 10 00 05 0C 00 00 C8 22 00 00 00 00 00 00 00 00 35 93 where 04 Slave address 4 10 Modbus Function Code 16 10 10 First Register to Write to 0005 Number of Registers to Write to OC Number of Bytes Following 12 00 00 Transmitter Address Hi 16 bits C8 22 Transmitter Address Lo 16 bits 00 00 Register 3 0 Transmitter Status 00 00 Register 4 0 Data 1 00 00 Register 5 Data 2 Data 3 00 00 Register 6 0 Data 4 3593 CRC 10 6 Transmitter Types The firmware in Modbus receivers manufactured on and after May 2013 will have updated firmware The update allows for all data types to be received and 16 bit mapping implemented Below is a description of the data
3. Appendix 2 Modbus CRC Algorithm A CRC 16 checksum is implemented on every message to detect any bit errors in the message The checksum calculation is only used to detect errors but cannot correct them The CRC is transmitted low byte first Little Endian The CRC generating polynomial used is x 6 x 5 x 1 Visual Basic CRC Routine CRC Algorithm Function Tcrcgen Hicrc amp HFF Locrc amp HFF Put data received into array For i 1 To Len Outstring Outarray i Mid Outstring i 1 Hicrc Hicrc Xor Asc Outarray i ForQ 1T08 Carry Hicrc And amp H1 Below is Hicrc Hicrc shr 1 amp 7F OR Locrc amp 01 shl 7 Hicrc Hicrc 2 If Locrc AND amp H1 lt gt O Then Hicrc Hicrc Or amp H80 End If Below is Locrc Locrc shr 1 and 7Fh Locrc Locrc 2 If Carry lt gt 0 Then Locrc Locrc Xor amp HAO Hicrc Hicre Xor amp H1 End If Next Q Next i End Function 22
4. EE VHF Modbus Receiver User Manual Version 2 0 Table of Contents 1 WEEE amp THE BATTERY DIRECTIVE usura a aid cia 3 2 INTRODUCTION uni ds 4 3 INSTALLATION haas am oh mm E EK MOS DATA a a E tena ne 5 Dol c TEOT AOU nsa ey Huima ananas mess esta Soitan Ltd kat Saa ds mi sed STEIN iad a pai e seen a 5 5 2 LED Indication missa m cn Oath len Aart air aad neni aaa aaa 5 4 CONNECTION S mua mean aa tan saas takes bss 6 5 CONFIGURA NON e aa e a 7 XL AA O eye OEE ESE SS 7 5 2 E RN 7 Tr AUTE IMIOGES a coat n AS 8 A OOO 8 5 3 2 16 Bit Addressing Extended Addressing Range oooccoocccconoccnonoccnoncnonnnncnonnncconnnncnoncncnnoncnnncnonnnos 8 DA Code Example ia 9 34 1 Code OO Progranr Unit ba lata IN cis so i hae cn hala 9 5 4 2 Code 03 Read Holding Registers 8 Bit Addressing 0 0 cee cceeesecesceceeececeeceeceeeeeceteeeesteeeesaes 9 5 4 3 Code 03 Read Holding Registers 16 Bit Addressing cooooonnncccnonccononcccnoncnononccononcconnncccnnncnonnnos 9 5 4 4 Code 16 Write Multiple Register 8 bit Addressing erre 10 5 4 5 Code 16 Write Multiple Register 16 Bit Addressing ii naa aan naaeen 10 6 TRANS MIT TER TYPES vasaa umskan ds asas ips da 11 Ol Pulse Transmitter Typs SU sagas paras pie esa masa A eeu 11 6 2 Digital Temperature Transmitter Type 82 n aa a e a naan naa maana enaa ae aaeet 11 6 3 Alarm Status Transmitter Type Sn 12 A
5. Bit 4 is Contact Status Chl Bits 0 3 is Firmware Revision Data 1 Data 3 24 bit pulse count value For example value 234455hex 2311253dec Data 4 Cumulative Counter that increments for each data transmission High nibble is signal strength between 0 10 for VHF transmitters Low nibble is incremental counter between 0 15 12 Appendix 1 Memory Map 8 Bit Addressing T Modbus Register X ota No Address Description Dec Hex 1 784 0310 Transmitter Address HHO 1 785 0311 Transmitter Address HO 1 786 0312 Transmitter Address LO 1 787 0313 Transmitter Status 1 788 0314 Data 1 1 789 0315 Data 2 1 790 0316 Data 3 1 791 0317 Data4 2 792 0318 Transmitter Address HHO 2 793 0319 Transmitter Address HO 2 794 031A Transmitter Address LO 2 795 031B Transmitter Status 2 796 031C Data 1 2 797 031D Data 2 2 798 031E Data 3 2 799 031F Data 4 3 800 0320 Transmitter Address HHO 3 801 0321 Transmitter Address HO 3 802 0322 Transmitter Address LO 3 803 0323 Transmitter Status 3 804 0324 Data 1 3 805 0325 Data 2 3 806 0326 Data 3 3 807 0327 Data4 4 808 0328 Transmitter Address HHO 4 809 0329 Transmitter Address HO 4 810 032A Transmitter Address LO 4 811 032B Transmitter Status 4 812 032C Data 1 4 813 032D Data 2 4 814 032E Data 3 4 815 032F Data 4 3 816 0330 Transm
6. 16 910 038E Data 3 16 911 038F Data 4 17 912 0390 Transmitter Address HHO 17 913 0391 Transmitter Address HO 17 914 0392 Transmitter Address LO 17 915 0393 Transmitter Status 17 916 0394 Data 1 17 917 0395 Data 2 17 918 0396 Data 3 17 919 0397 Data4 18 920 0398 Transmitter Address HHO 18 921 0399 Transmitter Address HO 18 922 039A Transmitter Address LO 18 923 039B Transmitter Status 18 924 039C Data 1 18 925 039D Data 2 18 926 039E Data 3 18 927 039F Data 4 19 928 03A0 Transmitter Address HHO 19 929 03A1 Transmitter Address HO 19 930 03A2 Transmitter Address LO 19 931 03A3 Transmitter Status 19 932 03A4 Data 1 19 933 03A5 Data 2 19 934 0346 Data 3 19 935 0347 Data4 20 936 03A8 Transmitter Address HHO 20 937 03A9 Transmitter Address HO 20 938 03AA Transmitter Address LO 20 939 03AB Transmitter Status 20 940 03AC Data 1 20 941 03AD Data 2 15 20 942 03AE Data 3 20 943 03AF Data 4 21 944 03B0 Transmitter Address HHO 21 945 03B1 Transmitter Address HO 21 946 03B2 Transmitter Address LO 21 947 03B3 Transmitter Status 21 948 03B4 Data 1 21 949 03B5 Data 2 21 950 03B6 Data 3 21 951 03B7 Data4 22 952 03B8 Transmitter Address HHO 22 953 03B9 Transmitter Address HO 22 954 03BA Transmitter Address LO 22 955 03BB Transmi
7. 19 4224 1080 Data 2 Data 3 19 4225 1081 0 Data 4 20 4226 1082 Transmitter Address Hi 16bits 20 4227 1083 Transmitter Address Lo 16bits 20 4228 1084 0 Transmitter Status 20 4229 1085 0 Data 1 20 4230 1086 Data 2 Data 3 20 4231 1087 0 Data 4 21 4232 1088 Transmitter Address Hi 16bits 21 4233 1089 Transmitter Address Lo 16bits 21 4234 108A 0 Transmitter Status 21 4235 108B 0 Data 1 21 4236 108C Data 2 Data 3 21 4237 108D 0 Data 4 22 4238 108E Transmitter Address Hi 16bits 22 4239 108F Transmitter Address Lo 16bits 22 4240 1090 0 Transmitter Status 22 4241 1091 0 Data 1 22 4242 1092 Data 2 Data 3 22 4243 1093 0 Data 4 25 4244 1094 Transmitter Address Hi 16bits 23 4245 1095 Transmitter Address Lo 16bits 23 4246 1096 0 Transmitter Status 23 4247 1097 0 Data 1 23 4248 1098 Data 2 Data 3 23 4249 1099 0 Data 4 24 4250 109A Transmitter Address Hi 16bits 24 4251 109B Transmitter Address Lo 16bits 24 4252 109C 0 Transmitter Status 24 4253 109D 0 Data 1 24 4254 109E Data 2 Data 3 24 4255 109F 0 Data 4 25 4256 10A0 Transmitter Address Hi 16bits 25 4257 10A1 Transmitter Address Lo 16bits 25 4258 10A2 0 Transmitter Status 25 4259 10A3 0 Data 1 25 4260 10A4 Data 2 Data 3 25 4261 10A5 0 Data 4 26 4262 1046 Transmitter Address Hi 16bits 26 4263 10A7 Transmitter Address Lo 16bits 26 4264 10A8 0 Transmitter Status 26 4265 10A9 0 Data 1 26 4266 10AA Data 2 Data 3 20
8. 6 4145 1031 0 Data 1 6 4146 1032 Data 2 Data 3 6 4147 1033 0 Data 4 7 4148 1034 Transmitter Address Hi 16bits 7 4149 1035 Transmitter Address Lo 16bits 7 4150 1036 0 Transmitter Status 7 4151 1037 0 Data 1 7 4152 1038 Data 2 Data 3 7 4153 1039 0 Data 4 8 4154 103A Transmitter Address Hi 16bits 18 8 4155 103B Transmitter Address Lo 16bits 8 4156 103C 0 Transmitter Status 8 4157 103D 0 Data 1 8 4158 103E Data 2 Data 3 8 4159 103F 0 Data 4 9 4160 1040 Transmitter Address Hi 16bits 9 4161 1041 Transmitter Address Lo 16bits 9 4162 1042 0 Transmitter Status 9 4163 1043 0 Data 1 9 4164 1044 Data 2 Data 3 9 4165 1045 0 Data 4 10 4166 1046 Transmitter Address Hi 16bits 10 4167 1047 Transmitter Address Lo 16bits 10 4168 1048 0 Transmitter Status 10 4169 1049 0 Data 1 10 4170 104A Data 2 Data 3 10 4171 104B 0 Data 4 11 4172 104C Transmitter Address Hi 16bits 11 4173 104D Transmitter Address Lo 16bits 11 4174 104E 0 Transmitter Status 11 4175 104F 0 Data 1 11 4176 1050 Data 2 Data 3 11 4177 1051 0 Data 4 12 4178 1052 Transmitter Address Hi 16bits 12 4179 1053 Transmitter Address Lo 16bits 12 4180 1054 0 Transmitter Status 12 4181 1055 0 Data 1 12 4182 1056 Data 2 Data 3 12 4183 1057 0 Data 4 13 4184 1058 Transmitter Address Hi 16bits 13 41
9. set to either Left Middle of header pins for RS232 mode Or Middle Right of header pins for RS485 mode 5 2 Programming A simple programming application is available from HWM to program and validate the receiver However it is strongly recommended that this is built into the system The Modbus Receiver supports the Modbus remote terminal unit RTU Slave Mode Only two standard function codes are supported O3dec amp 16dec an additional custom code 66gec is used to program unit ID The receiver needs to be programmed with the addresses of all the transmitters expected to receive A memory map is defined Appendix 1 holding the transmitter IDs status and data bytes This data can be read back by the Modbus Master device 5 3 Addressing Modes 5 3 1 8 Bit Addressing The addresses of the transmitters need to be programmed into the memory map and read back with the data as verification E g consider transmitter in memory slot 2 No Reg pec Reg Hex Description 2 792 0318 Transmitter Address HHO 2 793 0319 Transmitter Address HO 2 794 031A Transmitter Address LO 2 795 031B Transmitter Status 2 796 031C Data 1 2 797 031D Data 2 2 798 031E Data 3 2 799 031F Data 4 Registers 792 7944ec 0x0318 hold the 24 bit transmitter address so if data needs to be received from transmitter number 543224gec 00D432hex the registers will need to be programmed with the value 00D43
10. 2hex OOhex into register 0x0318 D4nex into register 0x0319 and 32hex into register Ox031A 5 3 2 16 Bit Addressing Extended Addressing Range No Reg pec Reg Hex Description 2 4118 1016 Transmitter Address Hi 16bits 2 4119 1017 Transmitter Address Lo 16bits 2 4120 1018 0 Transmitter Status 2 4121 1019 0 Data 1 2 4122 101A Data2 Data3 2 4123 101B 0 Data 4 Registers 4118 0x1016 and 4119 0x1017 hold the 24 bit transmitter address so if data needs to be received from transmitter number 76322 012A22yex the registers will need to be programmed with the value 012A22hex 0001 nex into register 0x1016 and 2A22hex into register Ox1017 When data is received from the transmitter the rest of the registers will be filled with the data received The transmitter status and data values vary in their content types depending on the transmitter type being received Modbus supports 8 to 16 bit formats and many of the values implemented on the AMR transmitters vary between 8 to 24 bits The Modbus receiver has an 8 bit and 16 bit Modbus v8 firmware standards implemented When using the 8 bit standard every register has the first 8 bits set as 00 E g data value 1122867 dec 112233hex in Modbus communications would be broken up into 3 registers and sent as 0011 hex 0022hex and 003 3hex 5 4 Code Examples Similarly the host has to configure the addresses in the same way Below are some example
11. 8 00 and above The Following table details the extended register map used for 16 bit addressing mode Tx Modbus Register Description No 2000 High byte Low byte Dec Hex N A 4096 1000 Firmware ID N A 4097 1001 Firmware Version N A 4098 1002 Freguency band 1 4112 1010 Transmitter Address Hi 16bits 1 4113 1011 Transmitter Address Lo 16bits 1 4114 1012 0 Transmitter Status 1 4115 1013 0 Data 1 1 4116 1014 Data 2 Data 3 1 4117 1015 0 Data 4 2 4118 1016 Transmitter Address Hi 16bits 2 4119 1017 Transmitter Address Lo 16bits 2 4120 1018 0 Transmitter Status 2 4121 1019 0 Data 1 2 4122 101A Data 2 Data 3 2 4123 101B 0 Data 4 3 4124 101C Transmitter Address Hi 16bits 3 4125 101D Transmitter Address Lo 16bits 3 4126 101E 0 Transmitter Status 3 4127 101F 0 Data 1 3 4128 1020 Data 2 Data 3 3 4129 1021 0 Data 4 4 4130 1022 Transmitter Address Hi 16bits 4 4131 1023 Transmitter Address Lo 16bits 4 4132 1024 0 Transmitter Status 4 4133 1025 0 Data 1 4 4134 1026 Data 2 Data 3 4 4135 1027 0 Data 4 5 4136 1028 Transmitter Address Hi 16bits 5 4137 1029 Transmitter Address Lo 16bits 5 4138 102A 0 Transmitter Status 3 4139 102B 0 Data 1 S 4140 102C Data 2 Data 3 5 4141 102D 0 Data 4 6 4142 102E Transmitter Address Hi 16bits 6 4143 102F Transmitter Address Lo 16bits 6 4144 1030 0 Transmitter Status
12. 85 1059 Transmitter Address Lo 16bits 13 4186 105A 0 Transmitter Status 13 4187 105B 0 Data 1 13 4188 105C Data 2 Data 3 13 4189 105D 0 Data 4 14 4190 105E Transmitter Address Hi 16bits 14 4191 105F Transmitter Address Lo 16bits 14 4192 1060 0 Transmitter Status 14 4193 1061 0 Data 1 14 4194 1062 Data 2 Data 3 14 4195 1063 0 Data 4 15 4196 1064 Transmitter Address Hi 16bits 15 4197 1065 Transmitter Address Lo 16bits 15 4198 1066 0 Transmitter Status 15 4199 1067 0 Data 1 15 4200 1068 Data 2 Data 3 15 4201 1069 0 Data 4 16 4202 106A Transmitter Address Hi 16bits 16 4203 106B Transmitter Address Lo 16bits 16 4204 106C 0 Transmitter Status 16 4205 106D 0 Data 1 16 4206 106E Data 2 Data 3 16 4207 106F 0 Data 4 17 4208 1070 Transmitter Address Hi 16bits 17 4209 1071 Transmitter Address Lo 16bits 17 4210 1072 0 Transmitter Status 19 17 4211 1073 0 Data 1 17 4212 1074 Data 2 Data 3 17 4213 1075 0 Data 4 18 4214 1076 Transmitter Address Hi 16bits 18 4215 1077 Transmitter Address Lo 16bits 18 4216 1078 0 Transmitter Status 18 4217 1079 0 Data 1 18 4218 107A Data 2 Data 3 18 4219 107B 0 Data 4 19 4220 107C Transmitter Address Hi 16bits 19 4221 107D Transmitter Address Lo 16bits 19 4222 107E 0 Transmitter Status 19 4223 107F 0 Data 1
13. O 28 1003 03EB Transmitter Status 28 1004 03EC Data 1 28 1005 03ED Data 2 28 1006 03EE Data 3 28 1007 03EF Data 4 29 1008 03F0 Transmitter Address HHO 29 1009 03F1 Transmitter Address HO 29 1010 03F2 Transmitter Address LO 29 1011 03F3 Transmitter Status 29 1012 03F4 Data 1 29 1013 03F5 Data 2 29 1014 03F6 Data 3 29 1015 03F7 Data4 30 1016 03F8 Transmitter Address HHO 30 1017 03F9 Transmitter Address HO 30 1018 03FA Transmitter Address LO 30 1019 03FB Transmitter Status 30 1020 03FC Data 1 30 1021 03FD Data 2 30 1022 03FE Data 3 30 1023 03FF Data 4 31 1024 0400 Transmitter Address HHO 31 1025 0401 Transmitter Address HO 31 1026 0402 Transmitter Address LO 31 1027 0403 Transmitter Status 31 1028 0404 Data 1 31 1029 0405 Data 2 31 1030 0406 Data 3 31 1031 0407 Data4 32 1032 0408 Transmitter Address HHO 32 1033 0409 Transmitter Address HO 32 1034 040A Transmitter Address LO 32 1035 040B Transmitter Status 32 1036 040C Data 1 32 1037 040D Data 2 32 1038 040E Data 3 32 1039 040F Data 4 The transmitter address and data values are 24 bit Modbus works with 16 bit registers all the above registers are sent as 16 bit addresses The high byte will always be 00 for example for a pulse count of 34562dec 008702hex will be sent as 0x0000 0x0087 amp 0x0002 for Data 1 Data 2 and Data 3 17 Memory Map 16 Bit Addressing Note 16 bit addressing mode is only available on firmware version V
14. PPENDIX los 13 Memory Map 8 Bit Addressing encinas in Paavoa vaga ansaa va ana dn eds 13 Memory Map 16 B Addressing ams mvs uoma asta a iia 18 APPENDIX Ge eee renee eon HRK Bee ee tere TSI AKKA KAN e da Saa pero ee 22 Modbus CRC Aloorithmisssssavusssavia ndice 22 1 WEEE amp the Battery Directive Waste Electrical and Electronic Equipment HWM Water Ltd is a registered producer of Electrical and Electronic Equipment in the United Kingdom registration number WEE AE0049TZ Our products fall under category 9 Monitoring and Control Instruments of The Waste Electrical and Electronic Equipment WEEE Regulations We take all environmental issues seriously and fully comply with the requirements for collection recycling and reporting of waste products HWM Water Ltd is responsible for WEEE from customers in the United Kingdom provided that The equipment was produced by HWM Water Ltd Palmer Environmental Radcom Technologies Radiotech ASL Holdings Ltd and supplied on or after 13th August 2005 The equipment was supplied before 13th August 2005 that has been directly replaced HWM Water Ltd products manufactured since 13th August 2005 HWM Water products supplied after 13th August 2005 can be identified by the following symbol Under HWM Water Ltd Terms and Conditions of Sale customers are responsible for the cost of returning WEEE to HWM Water Ltd and we are responsible for the costs of recycling and reporting on that waste Instru
15. Transmitter Address HHO 11 865 0361 Transmitter Address HO 11 866 0362 Transmitter Address LO 11 867 0363 Transmitter Status 11 868 0364 Data 1 11 869 0365 Data 2 11 870 0366 Data 3 11 871 0367 Data4 12 872 0368 Transmitter Address HHO 12 873 0369 Transmitter Address HO 12 874 036A Transmitter Address LO 12 875 036B Transmitter Status 12 876 036C Data 1 12 877 036D Data 2 12 878 036E Data 3 12 879 036F Data 4 13 880 0370 Transmitter Address HHO 13 881 0371 Transmitter Address HO 13 882 0372 Transmitter Address LO 13 883 0373 Transmitter Status 13 884 0374 Data 1 13 885 0375 Data 2 14 13 886 0376 Data 3 13 887 0377 Data4 14 888 0378 Transmitter Address HHO 14 889 0379 Transmitter Address HO 14 890 037A Transmitter Address LO 14 891 037B Transmitter Status 14 892 037C Data 1 14 893 037D Data 2 14 894 037E Data 3 14 895 037F Data 4 15 896 0380 Transmitter Address HHO 15 897 0381 Transmitter Address HO 15 898 0382 Transmitter Address LO 15 899 0383 Transmitter Status 15 900 0384 Data 1 15 901 0385 Data 2 15 902 0386 Data 3 15 903 0387 Data4 16 904 0388 Transmitter Address HHO 16 905 0389 Transmitter Address HO 16 906 038A Transmitter Address LO 16 907 038B Transmitter Status 16 908 038C Data 1 16 909 038D Data 2
16. ctions for returning WEEE Ensure that the WEEE meets one of the two conditions above The waste will need to be returned in accordance with the regulations for transporting data loggers with lithium batteries a Pack loggers in strong rigid outer packaging to protect them from damage b Attach a Lithium Warning Label to the package c The package must be accompanied by a document e g consignment note that indicates i The package contains lithium metal cells ii The package must be handled with care and that a flammability hazard exists if the package is damaged iii Special procedures should be followed in the event the package is damaged to include inspection and repacking if necessary and iiii A telephone number for additional information d Refer to the ADR regulations on shipping dangerous goods by road Return the WEEE to HWM Water Ltd using a licensed waste carrier In accordance with the regulations customers outside the United Kingdom are responsible for WEEE The Battery Directive As a distributor of batteries HWM Water Ltd will accept old batteries back from customers for disposal free of charge in accordance with the Battery Directive PLEASE NOTE All lithium batteries MUST be packaged and returned in accordance with the relevant regulations for transporting lithium batteries A licensed waste carrier must be used for transporting all waste For more information on WEEE compliance or the Battery Directive please e mail CSer
17. ed Data B Z MAM Cable must be Supply 12V screened RS232 Port RS485 Port Data and power connections should always be made using screened cable Using a screened cable will help to reject interference You should always use a common ground point and avoid the formation of current loops Terminal Description Notes Screen Earth Comms Cable Screen OV DC Power ve 12V DC Positive ve TX DATA RS232 Tx Output RX DATA RS232 RX Input B Z BZ RS485 ve A Y AY RS485 ve 5V OUT 5V Out Can be used as pull up for RS485 bus Note RS485 connections it is the responsibility of the system builder to ensure that the connections are correctly terminated Normally cables with an impedance of greater than 1000 should be used Open ends may need terminating using 1200 resistors between the AY and BZ terminals 5 Configuration 5 1 Dip Switch Settings SW1 Receiver outputs Binary data SW2 Receiver outputs ASCII data SW3 Set data rate to 4800Baud either SW3 or SW4 ON do not set both to ON position SW4 Set data rate to 9600Baud either SW3 or SW4 ON do not set both to ON position Note Only select SW1 or SW2 to be ON for serial format similarly with SW3 or SW4 for Baud rate Configuration DIP Switches a a Va Default Settings SW1 OFF SW2 OFF SW3 ON SW4 OFF The communication mode selection jumper should
18. itter Address HHO 5 817 0331 Transmitter Address HO 5 818 0332 Transmitter Address LO 3 819 0333 Transmitter Status S 820 0334 Data 1 5 821 0335 Data 2 5 822 0336 Data 3 S 823 0337 Data4 6 824 0338 Transmitter Address HHO 6 825 0339 Transmitter Address HO 6 826 033A Transmitter Address LO 6 827 033B Transmitter Status 6 828 033C Data 1 6 829 033D Data 2 13 6 830 033E Data 3 6 831 033F Data 4 7 832 0340 Transmitter Address HHO 7 833 0341 Transmitter Address HO 7 834 0342 Transmitter Address LO 7 835 0343 Transmitter Status 7 836 0344 Data 1 7 837 0345 Data 2 7 838 0346 Data 3 7 839 0347 Data4 8 840 0348 Transmitter Address HHO 8 841 0349 Transmitter Address HO 8 842 034A Transmitter Address LO 8 843 034B Transmitter Status 8 844 034C Data 1 8 845 034D Data 2 8 846 034E Data 3 8 847 034F Data 4 9 848 0350 Transmitter Address HHO 9 849 0351 Transmitter Address HO 9 850 0352 Transmitter Address LO 9 851 0353 Transmitter Status 9 852 0354 Data 1 9 853 0355 Data 2 9 854 0356 Data 3 9 855 0357 Data4 10 856 0358 Transmitter Address HHO 10 857 0359 Transmitter Address HO 10 858 035A Transmitter Address LO 10 859 035B Transmitter Status 10 860 035C Data 1 10 861 035D Data 2 10 862 035E Data 3 10 863 035F Data 4 11 864 0360
19. messages Note When using 8 bit addressing mode all data is transmitted as an 8 bit value and Modbus reads registers as 16 bit 2 registers Therefore the high register is always set as 00 5 4 1 Code 66 Program Unit ID To configure the receiver with unit ID 1001 hex using Modbus address 4 00 42 10 01 04 31 EE all values are hexadecimal where 0042 Global Message Code 66 1001 16 bit Receiver Address 04 Modbus Address to be programmed into unit 31 EE CRC To configure the receiver unit ID 1010 with a Modbus address 10 00 42 10 100A BC 7A all values are hexadecimal 5 4 2 Code 03 Read Holding Registers 8 Bit Addressing Read Ch1 Ch8 from Modbus Slave 10 0A 03 03 10 00 40 44 CO all values are hexadecimal where 0A Slave Address 10 03 Modbus Function Code 03 10 First Register to Read 0040 64 Registers to Read Appendix 1 44 CO CRC Read Ch9 Ch16 from Modbus Slave 10 0A 03 03 50 00 40 45 14 all values are hexadecimal Read Ch17 Ch24 from Modbus Slave 10 0A 03 03 90 00 40 45 28 all values are hexadecimal Read Ch25 Ch32 from Modbus Slave 10 0A 03 03 C8 00 40 C4 FB all values are hexadecimal 5 4 3 Code 03 Read Holding Registers 16 Bit Addressing Read Ch1 Ch8 from Modbus Slave 10 0A 03 10 10 00 30 44 CO all values are hexadecimal where OA Slave address 10 03 Modbus Function Code 10 10 First Register to Read 00 30 48 Registers to read Appendix 1 41 AO CRC
20. packet breakdowns for popular types of transmitter For a complete list of transmitter types please contact HWM 6 1 Pulse Transmitter Type 81 Transmitter Status Data 1 Data 3 Data 4 Bit 7 set for Low Battery Bit 4 is Tamper if available Bits 0 3 is Firmware Revision 24 bit Pulse Count Value For example Value 234455hex 2311253 dec Cumulative Counter that increments for each data transmission High nibble is signal strength between 0 10 for VHF transmitters Low nibble is incremental counter between 0 15 6 2 Digital Temperature Transmitter Type 82 Transmitter Status Data 1 Data 2 Bit 7 set for Low Battery Bits 0 3 is Firmware Revision 16 bit Temperature Channel 1 MSB set if Invalid Temperature Temperature Value value 2 Value Count Positive if Temperature gt 0 Value Counts in Reverse if Temperature lt 0 0002 gt 1 0 C 0001 gt 0 5 C 0000 gt 0 C OFFF gt 0 5 C OFFE gt 1 0 C Example 8034nex MSB set Invalid Temperature 0034hex 52dec Temperature 52 2 26 0 C OFC3hex 4035 dec Temperature 4096 4035 2 30 5 C Data 3 Data 4 Not Used Ignore Cumulative Counter that increments for each data transmission HO nibble is signal strength between 0 10 LO nibble is incremental counter between 0 15 11 6 3 Alarm Status Transmitter Type 88 Transmitter Status Bit 7 set for Low Battery Bit 5 is Contact Status Ch2
21. supply Both AC and DC power supplies can be used to power the receiver If using a switch mode power supply be aware these types can be rich in harmonics that can cause the high gain receiver module to block the reception of data The frequency of offending harmonics can shift with temperature time and load For maximum transmission range the antenna of both the transmitter and receiver should point upward vertical polarization and should be kept clear of obstructions particularly metallic surfaces As standard an N type helical antenna is supplied with the Modbus receiver should an alternative be required contact the HWM Sales department for alternatives Whatever antenna type is selected ensure the impedance is 50Q 3 1 Location For indoor installations it is recommended that the receiver is located away from sources of heat and electrical apparatus such as inverters Care should be taken to minimise cable lengths both with respect to the antenna location and the attached terminal equipment Generally RS232 should be used for short distance links lt 10m and RS485 for longer links lt 300m 3 2 LED Indication A number of visual indicators are present on the PCB to provide some level of diagnostics DC Power ON Green Receiver has power TxD LED ON Red Sending data on communications port RxD LED ON Amber Receiving data 4 Connections RS485 5V Supply OV Transmit Data Cable screen Receiv
22. tter Status 22 956 03BC Data 1 22 957 03BD Data 2 22 958 03BE Data 3 22 959 03BF Data 4 23 960 03C0 Transmitter Address HHO 23 961 03C1 Transmitter Address HO 23 962 03C2 Transmitter Address LO 23 963 03C3 Transmitter Status 23 964 03C4 Data 1 23 965 03C5 Data 2 23 966 03C6 Data 3 28 967 03C7 Data4 24 968 03C8 Transmitter Address HHO 24 969 03C9 Transmitter Address HO 24 970 03CA Transmitter Address LO 24 971 03CB Transmitter Status 24 972 03CC Data 1 24 973 03CD Data 2 24 974 03CE Data 3 24 975 03CF Data 4 25 976 03D0 Transmitter Address HHO 25 977 03D1 Transmitter Address HO 25 978 03D2 Transmitter Address LO 25 979 03D3 Transmitter Status 25 980 03D4 Data 1 25 981 03D5 Data 2 25 982 03D6 Data 3 25 983 03D7 Data4 26 984 03D8 Transmitter Address HHO 26 985 03D9 Transmitter Address HO 26 986 03DA Transmitter Address LO 26 987 03DB Transmitter Status 26 988 03DC Data 1 26 989 03DD Data 2 26 990 03DE Data 3 26 991 03DF Data 4 27 992 03E0 Transmitter Address HHO 27 993 03E1 Transmitter Address HO 27 994 03E2 Transmitter Address LO 27 995 03E3 Transmitter Status Dim 996 03E4 Data 1 27 997 03E5 Data 2 16 27 998 03E6 Data 3 27 999 03E7 Data4 28 1000 03E8 Transmitter Address HHO 28 1001 03E9 Transmitter Address HO 28 1002 03EA Transmitter Address L
23. vice Ohwm water com or phone 44 0 1633 489 479 If further support or assistance is required please contact HWM Technical Support on 01633 489479 option 5 or e mail support HWM Water com 2 Introduction The VHF Modbus receiver has been designed to provide a complete solution for fixed data collection It is designed to work in conjunction with most of the AMR range of VHF transmitters The receiver decodes the data verifies using a 16 bit CRC check Appendix 2 and passes the data packet through to the serial port Receiver Frequency 153 10MHz or 169 40625MHz Modbus Mode Modbus Slave Remote Terminal Unit RTU supported Slave address configurable Number of Devices Supported 32 Communications Protocol RS232 amp RS485 Communications Setup 4800 No Parity 8 bits 1 Stop or 9600 No Parity 8 bits 1 Stop Functions Codes Supported e 0x03 03 dec Read Holding Registers e 0x10 16dec Write Multiple Registers e 0x42 66 dec Special Function Code Operating Environment Operating Temperature Range 10 C to 40 C Recommended for indoor use only Dimensions 98 x 198 x 82mm approx excluding connectors and glands Protection Rating IP65 when sealed Power Supply Operating Voltage 12Vpc from plug top power supply Enclosure Die cast Aluminium painted grey 3 Installation As with any radio communication system the Modbus receiver should be connected to a clean and stable power
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