Parameter recovery¶
Drive parameters can drift, get reset by a firmware update, or get clobbered by an inexperienced operator at the keypad. The set below is what the facility requires to be remote-controllable. If any of them are wrong, restore them from this page.
The full parameter set is at Reference → Parameter index. This page covers just the critical ones for remote operation.
Verify before restoring¶
Read the parameters from the keypad or via Modbus. Identify which (if any) are wrong. Restore only those. Avoid a "reset everything to factory defaults" approach — it changes parameters we have not documented (acceleration ramps, voltage limits, motor tuning) and can put the facility into a worse state.
Reading via Modbus¶
Parameter n.m is at Modbus address n × 100 + m − 1. Example: 10.01 is at address 1000.
From WindTunnelControl.ps1 source (or any Modbus tool), read all the entries below.
Reading via keypad¶
Press MENU → PARAMETERS → navigate to the parameter group. The keypad will show <group>.<index> and the current value.
Critical parameter table¶
| Parameter | Required value | What goes wrong if it's wrong |
|---|---|---|
99.02 APPLIC MACRO |
1 (ABB Standard) | Macro change overrides everything else. Verify first. |
98.02 COMM PROT SEL |
4 (EXT FBA) | Fieldbus (RETA-01) is disabled. No Modbus communication at all. |
10.01 EXT1 COMMANDS |
10 (COMM) | Start/Stop commands from Modbus are ignored. Drive sits in REM but never starts. |
11.02 EXT1/EXT2 SEL |
0 (EXT1) | EXT2 is active; our config is in EXT1. |
11.03 REF1 SELECT |
8 (COMM) | REF1 writes from Modbus are ignored. Drive accepts the start command but spins at zero RPM. |
51.03 DHCP |
0 (disabled) | RETA-01 hunts for a DHCP server and ends up on an unpredictable IP. |
51.04 |
192 | IP octet 1 of the RETA-01. |
51.05 |
168 | IP octet 2. |
51.06 |
50 | IP octet 3. |
51.07 |
10 | IP octet 4. |
51.08 |
255 | Netmask octet 1. |
51.09 |
255 | Netmask octet 2. |
51.10 |
255 | Netmask octet 3. |
51.11 |
0 | Netmask octet 4. |
51.16 PROTOCOL |
0 (Modbus/TCP, ABB Drives profile) | Wrong profile = wrong register map = our control words become noise. |
Restoring via the keypad¶
For a parameter group at the keypad:
MENU→PARAMETERS→ navigate to<group>→<index>.- Press
EDIT. - Use the up/down keys to set the value.
- Press
SAVE.
For the IP and netmask entries in group 51, the drive needs to be power-cycled for the change to take effect. Open the main switch, wait 30 s, close.
Restoring via Modbus¶
Some parameters are not writable via Modbus in the ABB Drives profile (the drive returns Modbus exception code 2 = ILLEGAL DATA ADDRESS). Group 51 is one of them — the RETA-01 reads its own IP configuration directly from the drive's parameter store at boot, and changing it over the running Modbus connection would cut you off mid-write. Use the keypad for group 51.
For 10.01, 11.02, 11.03, 98.02, 99.02: these may be writable via Modbus depending on the drive's parameter lock state. The keypad is the reliable path.
Backup approach¶
A future improvement (tracked separately) is a script that reads the full parameter set into a CSV and stores it in the repo. Until that exists, the Reference → Parameter index page is the authoritative copy of the values; this page restores from it.