Nidec H300 - Serial Mode; Serial Baud Rate

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HVAC Drive H300 173
Issue Number: 3
10.2.2 Serial Mode
Serial Mode (Pr 11.024) defines the data format used by the serial comms interface. The bits in the value of Serial Mode define the data format as
follows:
Table 10-3 Serial mode bits
For the Modbus RTU protocol bit, 3 should always be set to 0 as 8 data bits are required. The parameter value can be extended with the remaining
communication protocols if required.
Bit 2 selects either standard or modified register mode. The menu and parameter numbers are derived for each mode as given in the table below.
Standard mode is compatible with Unidrive SP. Modified mode is provided to allow register numbers up to 255 to be addressed.
Table 10-4 Register mode
Table 10-5 Serial mode
Changing the parameters does not immediately change the serial communications settings. Revised values will only be used after the next power-up
or if Reset Serial Communications (Pr 11.020) is set to one.
10.2.3 Serial baud rate
Serial Baud Rate (Pr 11.025) defines the baud rate used by the serial comms interface.
Table 10-6 Serial baud rate
Revised values will only be used after the next power-up or if Reset Serial Communications (Pr 11.020) is set to one.
Bits 3 2 1 and 0
Format
Number of data bits
0 = 8 bits
1 = 7 bits
Register mode
0 = Standard
1 = Modified
Stop bits and Parity
0 = 2 stop bits, no parity
1 = 1 stop bit, no parity
2 = 1 stop bit, even parity
3 = 1 stop bit, odd parity
Register mode Register address
Standard (mm x 100) + ppp - 1 where mm ≤ 162 and ppp ≤ 99
Modified (mm x 256) + ppp - 1 where mm ≤ 63 and ppp ≤ 255
Pr 11.024 Description
08 2 NP
18 1 NP
28 1 EP
38 1 OP
48 2 NP M
58 1 NP M
68 1 OP M
78 1 OP M
87 2 NP
97 1 NP
10 7 1 EP
11 7 1 OP
12 7 2 NP M
13 7 1 NP M
14 7 1 EP M
15 7 1 OP M
Pr 11.025 Description
0 300
1 600
2 1200
3 2400
4 4800
5 9600
6 19200
7 38400
8 57600
9 76800
10 115200