String test not working

[isaac-trunorth]

I'm using a Compact GuardLogix, on v35. When trying to read a string from the PLC this is what I'm seeing:

🔧 [DEBUG] Parsing CIP response (96 bytes): [CC, 00, 00, 00, A0, 02, CE, 0F, 04, 00, 00, 00, 74, 65, 73, 74, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
🔧 [DEBUG] Service reply: 0xCC, Status: 0x00
🔧 [DEBUG] Data type: 0x02A0, Value data (90 bytes): [CE, 0F, 04, 00, 00, 00, 74, 65, 73, 74, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
🔧 [DEBUG] Detected UDT structure (0x02A0) with 90 bytes
🔧 [DEBUG] Raw UDT data: [CE, 0F, 04, 00, 00, 00, 74, 65, 73, 74, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
🔧 [DEBUG] Parsing UDT structure with 90 bytes
🔧 [DEBUG] Alignment 0: DINT1=266190, DINT2=1702100992, REAL=0.000000000000000000000000000000000000000041774
🔧 [DEBUG] Reasonableness check: DINT1=266190 (false), DINT2=1702100992 (false), REAL=0.000000000000000000000000000000000000000041774 (true)
🔧 [DEBUG] Alignment 1: DINT1=1039, DINT2=1936028672, REAL=0.000000000000000000000000000000000000000000163
🔧 [DEBUG] Reasonableness check: DINT1=1039 (false), DINT2=1936028672 (false), REAL=0.000000000000000000000000000000000000000000163 (true)
🔧 [DEBUG] Alignment 2: DINT1=4, DINT2=1953719668, REAL=0
🔧 [DEBUG] Reasonableness check: DINT1=4 (true), DINT2=1953719668 (false), REAL=0 (true)
🔧 [DEBUG] Alignment 3: DINT1=1946157056, DINT2=7631717, REAL=0
🔧 [DEBUG] Reasonableness check: DINT1=1946157056 (false), DINT2=7631717 (false), REAL=0 (true)
🔧 [DEBUG] DINT_at_start: DINT = 266190
🔧 [DEBUG] DINT_at_end: DINT = 0

• It is getting recognized as a UDT with a single key in it
• As a side note, when parsing a UDT, it would be great to get the raw data returned. so making something like read_tag_raw available that just returns the array of bytes. This would allow easier parsing of UDTs, and defining a struct that can impl From<PlcValue::UDT in order to parse more complicated UDTs. The current parsing attempt seems to be not robust enough

[sergiogallegos]

check the new v0.6.0 ... the library can modify Strings, just Reads, it looks like is a limitation from the rockwell side.