BACnet troubles connecting

[zoltan]

Here is what I have found with the help of VTS:

Code:

[ Summary Information ] Time:        13:42:31.207 Source:      192.168.1.3:47808 Destination: Local Broadcast Summary:     Who-Has, 234-234, Error! [ Detail Information ] ----- IP Frame Detail ----- Source/Destination          = 192.168.1.3:0xBAC0 ----- BACnet Virtual Link Layer Detail ----- BVLC Type                   = BACnet/IP BVLC Function               = 11  Original-Broadcast-NPDU BVLC Length                 = 26 ----- BACnet Network Layer Detail ----- Protocol Version Number = 1 Network Control Octet       = X'00'                  0... .... = BACnet APDU                  .0.. .... = Reserved                  ..0. .... = DNET,DLEN,DADR & Hop Count Omitted                  ...0 .... = Reserved                  .... 0... = SNET,SLEN, & SADR Omitted                  .... .0.. = No Reply Expected                  .... ..00 = Normal Message ----- BACnet Application Layer Detail ----- Who-Has Request First Header Octet          = X'10'                  0001 .... = BACnet-Unconfirmed-Request-PDU                  .... 0000 = Unused Who-Has Request             = 7 [0] deviceInstanceRangeLowLimit:  234 SD Context Tag              = X'09'                  0000 .... = [0]                  .... 1... = Context Specific Tag                  .... .001 = Length = 1 Value                       (1-octet unsigned) = 234 [1] deviceInstanceRangeHighLimit:  234 SD Context Tag              = X'19'                  0001 .... = [1]                  .... 1... = Context Specific Tag                  .... .001 = Length = 1 Value                       (1-octet unsigned) = 234 [3] objectName:  "Temp_Masaza" SD Context Tag              = X'3D'                  0011 .... = [3]                  .... 1... = Context Specific Tag                  .... .101 = Extended Length Length of data              = 12 ISO 8859-1                  = 5 Character string            = X'54656D705F4D6173617A61'

I am asking for the object named "Temp_Masaza", but the PLC is encoding it in some different format (54656D705F4D6173617A61), not sure what is going  on here.

When I send the request from VTS the LM4 responds with I-Have as expected.

Code:

[ Summary Information ] Time:        14:06:31.030 Source:      TD Destination: (65535, broadcast) via Local Broadcast Summary:     Who-Has, 234-234, Temp_Masaza [ Detail Information ] ----- IP Frame Detail ----- Source/Destination          = 192.168.1.155:0xBAC0 ----- BACnet Virtual Link Layer Detail ----- BVLC Type                   = BACnet/IP BVLC Function               = 11  Original-Broadcast-NPDU BVLC Length                 = 30 ----- BACnet Network Layer Detail ----- Protocol Version Number = 1 Network Control Octet       = X'20'                  0... .... = BACnet APDU                  .0.. .... = Reserved                  ..1. .... = DNET,DLEN,DADR & Hop Count Present                  ...0 .... = Reserved                  .... 0... = SNET,SLEN, & SADR Omitted                  .... .0.. = No Reply Expected                  .... ..00 = Normal Message Global Broadcast DNET          = X'FFFF', Global Broadcast Destination MAC address length = 0 Broadcast MAC address implied Hop Count                   = 255 ----- BACnet Application Layer Detail ----- Who-Has Request First Header Octet          = X'10'                  0001 .... = BACnet-Unconfirmed-Request-PDU                  .... 0000 = Unused Who-Has Request             = 7 [0] deviceInstanceRangeLowLimit:  234 SD Context Tag              = X'09'                  0000 .... = [0]                  .... 1... = Context Specific Tag                  .... .001 = Length = 1 Value                       (1-octet unsigned) = 234 [1] deviceInstanceRangeHighLimit:  234 SD Context Tag              = X'19'                  0001 .... = [1]                  .... 1... = Context Specific Tag                  .... .001 = Length = 1 Value                       (1-octet unsigned) = 234 [3] objectName:  "Temp_Masaza" SD Context Tag              = X'3D'                  0011 .... = [3]                  .... 1... = Context Specific Tag                  .... .101 = Extended Length Length of data              = 12 ASCII/UTF-8 Character Encoding = 0 Character string            = Temp_Masaza *************************** [ Packet 270 End ] *************************** *************************** [ Packet 271 Start ] *************************** [ Summary Information ] Time:        14:06:31.033 Source:      192.168.1.2:47808 Destination: (65535, broadcast) via Local Broadcast Summary:     I-Have, device_234, analog-value_10303 [ Detail Information ] ----- IP Frame Detail ----- Source/Destination          = 192.168.1.2:0xBAC0 ----- BACnet Virtual Link Layer Detail ----- BVLC Type                   = BACnet/IP BVLC Function               = 11  Original-Broadcast-NPDU BVLC Length                 = 36 ----- BACnet Network Layer Detail ----- Protocol Version Number = 1 Network Control Octet       = X'20'                  0... .... = BACnet APDU                  .0.. .... = Reserved                  ..1. .... = DNET,DLEN,DADR & Hop Count Present                  ...0 .... = Reserved                  .... 0... = SNET,SLEN, & SADR Omitted                  .... .0.. = No Reply Expected                  .... ..00 = Normal Message Global Broadcast DNET          = X'FFFF', Global Broadcast Destination MAC address length = 0 Broadcast MAC address implied Hop Count                   = 255 ----- BACnet Application Layer Detail ----- I-Have Request First Header Octet          = X'10'                  0001 .... = BACnet-Unconfirmed-Request-PDU                  .... 0000 = Unused I-Have Request              = 1 deviceIdentifier:  device,234 Application Tag             = X'C4'                  1100 .... = Object Identifier                  .... 0... = Application Tag                  .... .100 = Length = 4 BACnet Object Identifier               Standard Object Type               Object Type = device               Instance Number = 234 objectIdentifier:  analog-value,10303 Application Tag             = X'C4'                  1100 .... = Object Identifier                  .... 0... = Application Tag                  .... .100 = Length = 4 BACnet Object Identifier               Standard Object Type               Object Type = analog-value               Instance Number = 10303 objectName:  "Temp_Masaza" Application Tag             = X'75'                  0111 .... = Character String                  .... 0... = Application Tag                  .... .101 = Extended Length Length of data              = 12 ASCII/UTF-8 Character Encoding = 0 Character string            = Temp_Masaza

Can I do anything with the LM4 to accept this kind of request?
Attached is the discover log from VTS.

br, Z