Instruction manual

3
6. ZM-Link 3-21
Serial Communications
6. ZM-Link
ZM-Link
• “ZM-Link” is the network where the computer reads from and writes to the internal
memory of the ZM-300 series, memory card, PLC memory or temperature control/PLC2
memory using a dedicated protocol.
• Use the MJ port of the ZM-300 series for connection with a general-purpose computer.
For connection with the PLC using a temperature controller or the PLC2Way function,
use the other MJ port and use CN1 for communications with the PLC. Data of the PLC
or temperature controller can be collected through communications with the ZM-300
series. Data collection is available even between the products of different
manufacturers.
• Either signal level RS-232C or RS-485 can be selected. With RS-232C, one ZM-300
series can be connected; with RS-485, a maximum of 31 ZM-300 series can be
connected.
<RS-485 connection>
PLCPC
RESET
disc
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
ZM-300 series
Dedicated commands
Read
Write
PLC
RS-232C
RS-422
RS-485
PLC
PLC
RS-485
RS-232C
RS-422
RS-485
CN1
CN1
CN1 MJ2
MJ2/1
MJ2/1 MJ1
RESET
disc
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
Inverter or PLC
Local
Port 1
Local
Port 2
Local
Port 31