Satec PM130 User Manual

9
3.6 Exception Responses
The instrument sends an exception response when errors are detected in the received
message. To indicate that the response is notification of an error, the high order bit of the
function code is set to 1.
Exception Response
Instrument
Address
Function (high
order bit is set to 1)
Exception
Code
Error Check
1 byte 1 byte 1 byte 2 byte
Exception response codes:
01
- Illegal function
02
- Illegal data address
03
- Illegal data value
06
- Busy, rejected message. The message was received without errors, but the instrument is
being programmed from the keypad (only for requests accessing setup registers).
NOTE
When the character framing, parity, or redundancy check detects a communication
error, processing of the master's request stops. The instrument will not act on or respond to the
message.

Satec PM130 Specifications

General

Frequency Measurement Range	45 to 65 Hz
Power Supply	85-265V AC/DC, 100-300V DC
Display	LCD
Communication	RS485
Digital Inputs	2
Digital Outputs	2
Protocols	Modbus RTU
Accuracy	0.2% of reading
Power Accuracy	0.5%