3
RG-MCMET
Introduction
2
Introduction
This document will explain how to operate a Lenze-AC Tech MC3000 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
MC3000 Installation and Operation Manual (M301).
2.1 Metasys N2 Communications
MC3000 drives running N2 protocol act as N2 devices on a Metasys® Network and function as slaves only.
Thus the device communicating with an MC3000 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 MC3000 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: MC3000 Terminal Strip
The
N2+
terminal is connected to MC3000 drive terminal RXA.
The
N2-
terminal is connected to MC3000 drive terminal TXB.
The
N2
Reference is connected to MC3000 drive terminal 2.
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