5-1
5 REMOTE OPERATION
5.1 Introduction
This section describes how to program the MML series electronic load remotely from a
GPIB controller or RS232C. The command set introduced here can be applied to all
electronic loads of the MML series, including MML-80-20-102 and MML-80-60-301,
equipped with optional GPIB cards or standard equipment, RS232C.
Either GPIB or RS232C can be used at one time; they cannot be used simultaneously.
If GPIB is used first in remote control, RS232C will be disabled until the unit has been
reset, and vice versa.
5.2 DIP Switches on the GPIB Card
5.2.1 GPIB
Address
Each device connected to the GPIB interface is assigned a unique address to allow
communication with the system controller. Before programming the electronic load
remotely via a GPIB computer, you need to know the GPIB address.
Setting the GPIB address of an individual mainframe is done with an 8-bit DIP switch on
a GPIB card at its rear panel. The five bits from A1 to A5 are GPIB address bits which
provide addressing space from 0 to 30. For details, please refer to Figure 5-1 and
Table 5-1.
ON
A1
A2
A3
A4
A5
SHIELD GND
MASTER/SLAVE
PON-SRQ
A8:
A7:
A6:
Figure 5-1 GPIB DIP Switch
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