Remote Control; General; Interface Parameters; Change Of The Baud Rate (Valid From Version 2.40) - Hameg HM8143 Handbuch

Please turn off the instrument if one of these errors occurs. If
the error is still displayed after resetting the instrument, it has
to be sent in. Please contact the HAMEG service department
(Tel: +049 (0) 6182 800 500, E-Mail: service@hameg.com).

Remote control

General

The HM8143 comes with a RS-232 interface, which optionally
can be replaced by a IEEE-488 (HO880) or an USB interface
(HO870). We recommend the installation ex factory.

Interface parameters:

9600 baud, no paritybit, 8 data bits, 1 stop bit
When being controlled by interface, the HM8143 immediately
goes into remote mode as soon as a command arrives at the
interface. The REMOTE LED
ar disabled. Mixed operation, in which the instrument can also
be manually operated using the frontpanel controls although it
is connected to an interface, is possible by using the command
MX1. The commands have to be terminated with CR (0x0D). The
commands may contain upper and lower case characters.

Change of the baud rate (valid from version 2.40)

From fi rmware version 2.40 the baud rate of the HM8143 can
be varied. The selected transmission rate is indicated during
the boot procedure in the current display of channel 2
baud rate is set to 19200 baud, the instrument shows „19.2".
To change the baud rate, keep the OUTPUT button
when switching on the instrument until you hear 3 beeps. The
baud rate is changed according to the following pattern:
9600 > 19200 > 4800 > 9600 etc.
Only one step is possible for every boot procedure , i.e. to
change the baud rate from 4800 baud to 19200 baud, the
HM8143 must be powered on two times with the OUTPUT but-
ton pressed.
Please note, that the data transmission rate has to be set to
9600 Baud when using the GPIB interface.

Command reference

RM1 + RM0
Format: RM1
Function: Puts the power supply in remote mode.
The frontpanel controls are disabled. In this mode,
the power supply can only be operated by interface.
This mode can be terminated by sending a RM0 com-
mand.
Format: RM0
Function: Disables the remote mode, returning the power
supply to local mode (permitting operation using
the front panel controls).
is on and all operating controls
. If the
pressed
MX1 + MX0
Format: MX1
Function: Switches the power supply from remote mode into
mixed mode. In mixed mode, the instrument can be
operated either by interface or using the frontpanel
controls.
Format: MX0
Function: Terminates mixed mode and returns the instrument
to remote mode.
SU1 + SU2
Format: SU1:VV.mVmV or SU2:01.34
SU1:VV.mVmV or SU2:01.34
Function: Sets voltage 1 or voltage 2 to the indicated value (SET
value; BCD format)
©
Example: SU1:1.23
©
SU2:12.34
SI1 + SI2
Format: SI1:A.mAmAmA or SI1:0.123
SI1:A.mAmAmA or SI1:0.123
Function: Sets current limit 1 or current limit 2 to the indicated
value (LIMIT value; BCD format)
©
Examples: SI1:1.000
©
SI2:0.123
RU1 + RU2
Format: RU1 or RU2
Reply: U1:12.34V or U2:12.34V
Function: The voltage values sent back by the HM8143 are
the programmed voltage values. Use the MUx com-
mands to query the actual values.
RI1 + RI2
Format: RI1 or RI2
Reply: I1:+1.000A or I2:–0.012A
Function: The current values sent back by the HM8143 repre-
sent the programmed limit values for the current.
Use the MIx commands to query the actual current
values.
MU1 + MU2
Format: MU1 or MU2
Reply: U1:12.34V or U2:12.24V
Function: The voltage values sent back by the HM8143 rep-
resent the actual voltage values last measured at
the outputs. Use the RUx commands to query the
voltage values set.
MI1 + MI2
Format: M11 or M12
Reply: I1=+1.000A or I2=–0.123A
Function: The current values sent back by the HM8143 repre-
sent the actual current values last measured. Use
the RIx commands to query the programmed current
limit value. If the outputs are switched off, then the
reply will be I1: 0.000 A.
TRU
Format: TRU:VV.mVmV
TRU:VV.mVmV
Function: Sets voltage 1 and voltage 2 to the indicated value
(voltage values in TRACKING mode). The values
must follow the BCD format.
©
Examples: TRU:1.23
©
TRU:01.23
©
TRU:12.34
R e m o t e c o n t r o l
U1 = 1.23 V
U2 = 12.34 V
I1 = 1.000 A
I2 = 0.123 A
U1 = U2 = 1.23 V
U1 = U2 = 1.23 V
U1 = U2 = 12.34 V
Subject to change without notice
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