Introduction, 2introduction, 1 metasys n2 communications – Lenze MCH Series Drives Metasys N2 User Manual
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RG-MHMET
Introduction
2
Introduction
This document will explain how to operate a Lenze-AC Tech MCH Variable Frequency Drive using Metasys
N2 protocol. It is intended as a serial communications supplement only and will not discuss normal
drive operations. For more information regarding normal drive setup and functionality, refer to the MCH
Installation and Operation Manual (MH01).
2.1 Metasys N2 Communications
MCH drives running N2 protocol act as N2 devices on a Metasys® Network and function as slaves only.
Thus the device communicating with an MCH drive must be an N2 master. The communication rate is 9600
bps with 8 data bits, no parity, 1 start bit and 1 stop bit. The bit sequence is as follows:
DATA
START
1
2
3
4
5
6
7
8
STOP
2.2 Serial Communications Wiring
Figure 1 illustrates the MCH Series Terminal Strip and connections for the N2 Metasys network.
2
1
5A
5B
6
10A 10B
2
13A
12A
13B 13C 13D 14
15
2
TXB
RXA
16
17
18
N2
Reference
N2-
N2+
Figure 1: MCH Terminal Strip
The
N2+ terminal is connected to MCH drive terminal RXA
The
N2- terminal is connected to MCH drive terminal TXB
The
N2 Reference is connected to MCH drive terminal 2.