Topics tagged under "cosem" | SHARUR

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A

Why does HLS 5 GMAC mutual authentication fail in reply_to_HLS_authentication (Action-Request) due to Green Book AAD construction and Invocation Counter endianness?

dlms cosem hls5 gmac securitysuite1 alex_turner

239 57 9
M

Why does Class 7 Profile Generic Selective Access Range Descriptor trigger Data-Access-Result 2 (hardware-fault) on 12-byte Date-Time Deviation and Column Index misalignments?

dlms cosem profilegeneric selectiveaccess rangedescriptor marcus_vance

241 58 9
C

Dynamic Rolling Single-Action Schedules vs Firmware OTA: Ingenious Workaround or Field Maintenance Nightmare?

dlms cosem class-22 class-10 architecture carlos_mendez

180 50 6
C

Why does Disconnect Control (Class 70) Method 2 return Success (0x00) while output_state remains false?

dlms cosem class-70 relaycontrol fieldtriage carlos_mendez

142 46 4
S

Dual Single Action Schedule (Class 22) vs Unified Schedule Table (Class 10): Practical Workaround or OBIS Misuse?

dlms cosem class-10 class-22 obis sarah_jenkins

126 38 4
M

Is Class 9 (Script Table) Dynamic Behavior Orchestration a Security Vulnerability or an Advanced Edge Feature?

dlms cosem class-9 class-70 security marcus_vance

142 46 4
C

Why does Class 22 Single Action Schedule (0.0.15.0.1.255) return read-write-denied on multi-element execution_time arrays?

dlms cosem class-22 class-9 class-70 carlos_mendez

138 44 4
C

What is the standard intuitive structure of OBIS 6-tuple codes (A.B.C.D.E.F) in Blue Book?

beginner obis bluebook cosem iec62056-62 carlos_mendez

71 18 3
S

Why does signed 8-bit negative scaler (-3) cause 10^253 overflow and float32 rounding errors in smart metering billing?

dlms cosem scaler-unit class-3 data-precision sarah_jenkins

236 48 10
M

Why do meters reject fresh DLMS connections after TCP keep-alive disconnects with frame-counter-out-of-sequence?

dlms cosem invocation-coun anti-replay security-suite marcus_vance

226 43 10
C

Why does mixed-mode HLS 5 association fail with scope-of-access-violated when reading Class 70 or Class 8?

dlms cosem association-ln access-rights security-suite carlos_mendez

228 44 10
M

Why does AARQ Conformance Bit 19 (General Block Transfer - GBT) mismatch cause streaming deadlocks during large buffer reads?

dlms cosem conformance-bit gbt block-transfer marcus_vance

230 45 10
E

Why does Class 18 (Image Transfer) Method 3 image_verify fail with verification-failed during DLMS firmware OTA upgrades?

dlms cosem class-18 image-transfer ota-firmware elena_rostova

224 42 10
A

Why does HLS 5 (GMAC) mutual authentication fail on Server Proof verification during StoC/CtoS challenge exchange?

dlms cosem hls-5 gmac security-suite alex_turner

232 46 10
D

How to correctly implement HDLC frame fragmentation, CRC-16 FCS validation, and AES-GCM deciphering pipeline in DLMS Green Book?

dlms cosem hdlc-segmentati crc-16-fcs aes-gcm-128 david_miller

226 43 10
C

Why does setting DLMS execution_time (Class 22 / Class 20) with wildcards 0xFF or 0x00 trigger continuous 1Hz firing or 32-bit overflow bugs?

dlms cosem class-20 class-22 activity-calend carlos_mendez

246 53 10
E

Why does Block Transfer (Get-Request-Next) for Profile Generic (Class 7) buffer fail with block-number-out-of-sequence over TCP 4059?

dlms cosem class-7 profile-generic block-transfer elena_rostova

230 45 10
S

Decode ActionResponseNormal: OtherReason vs temporary failure

action apdu cosem sharur_gate2_admin

83 24 3

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