CE02 Modbus: Illegal Address fault in delta drive

CE02 Modbus: Illegal Address fault in delta drive troubleshooting

Description

CE02 is the most common specific communication error. The drive received a valid packet, but the Register Address requested does not exist in the drive's memory map.

Causes

1. Wrong Hex Address: You are trying to read Address 2000H (Frequency Command) but typed 3000H.
2. Length Error: You requested a "Block Read" (Function 03) starting at valid address 2000H but requested 50 registers. If the drive only has mapped registers up to 2010H, the excess range triggers CE02.
3. Offset: PLCs often use "40001" notation. Delta uses hex addresses (e.g., Pr.00-01 = 0001H). Converting incorrectly creates invalid addresses.

Solution

Map verification:
1. Check Manual: Look at the "Modbus Communication Address List" in the manual.
2. Reduce Length: If reading a block, try reading just 1 word to test.
3. Decimal/Hex: Ensure you aren't sending Decimal 2000 instead of Hex 2000.