ABB ACS550 Series, User Manual

Page: 172 / 310

172 ACS550 User’s Manual
Parameters
Group 52: PANEL COMM
This group defines the communication settings for the control panel port on the drive.
Normally, when using the supplied control panel, there is no need to change settings
in this group.
In this group, parameter modifications take effect on the next power-up.
Code Description
5201 STATION ID
Defines the address of the drive.
• Two units with the same address are not allowed on-line.
• Range: 1…247
5202 BAUD RATE
Defines the communication speed of the drive in kbits per second (kb/s).
9.6 kb/s
19.2 kb/s
38.4 kb/s
57.6 kb/s
115.2 kb/s
5203 PARITY
Sets the character format to be used with the panel communication.
0 = 8
NONE
1 – No parity, one stop bit.
1 = 8
NONE
2 – No parity, two stop bits.
2 = 8
EVEN
1 – Even parity, one stop bit.
3 = 8
ODD
1 – Odd parity, one stop bit.
5204 OK MESSAGES
Contains a count of valid Modbus messages received by the drive.
• During normal operation, this counter is increasing constantly.
5205 PARITY ERRORS
Contains a count of the characters with a parity error that is received from the bus. For high counts, check:
• Parity settings of devices connected on the bus – they must not differ.
• Ambient electro-magnetic noise levels – high noise levels generate errors.
5206 FRAME ERRORS
Contains a count of the characters with a framing error that the bus receives. For high counts, check:
• Communication speed settings of devices connected on the bus – they must not differ.
• Ambient electro-magnetic noise levels – high noise levels generate errors.
5207 BUFFER OVERRUNS
Contains a count of the characters received that cannot be placed in the buffer.
• Longest possible message length for the drive is 128 bytes.
• Received messages exceeding 128 bytes overflow the buffer. The excess characters are counted.
5208 CRC ERRORS
Contains a count of the messages with a CRC error that the drive receives. For high counts, check:
• Ambient electro-magnetic noise levels – high noise levels generate errors.
• CRC calculations for possible errors.