CET Electric Technology
93
Application Layer's Function and Qualifier Code Description
16-bit start/stop indices
Single field index, 8-bit format
Single field index, 16-bit format
Direct Operate With Acknowledge
Direct Operate Without
Acknowledge
Immediate Freeze - No
Acknowledge
Freeze and Clear with
Acknowledge
Freeze and Clear - No
Acknowledge
Enable Spontaneous Messages
Disable Spontaneous Messages
Data Link Layer
The PMC-53A can be assigned a device address between 0 and 65519. After device restart, Function
Code 0 (Reset of Remote Link) must be executed to enable DNP communication. The following table
describes which Data Link Layer functions are supported.
ACK - Positive Acknowledgement
NACK - Message Not Accepted, Link Busy
Link Service Not Functioning
Link Service Not Used or Implemented
Physical Layer
The Port 1 RS-485 is designed to support the DNP 3.0 protocol.
1200/2400/4800/9600*/19200/38400