13.12.2016, 09:02
Here is what I have found with the help of VTS:
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.
Can I do anything with the LM4 to accept this kind of request?
Attached is the discover log from VTS.
br, Z
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_MasazaCan I do anything with the LM4 to accept this kind of request?
Attached is the discover log from VTS.
br, Z