WCL488 Series Water Cooled Electronic Loads
Operation & Programming Manual
TDI-Dynaload Division
Page 68
402828, Rev. B1
LAT Latch register
This command provides access to the Latch register. The bits in this
register define which bits of the Condition (CON) register will latch
on if set until the CON register is read. Setting one bit by writing its
bit weight into the LAT register enables its equivalent bit in the
CON register.
The individual bits are defined below. More than one bit can be
enabled by writing a value that is a sum of the individual bit
weights. The Over Voltage and Over Temperature bits in this
register will remain set regardless of what value is written to this
register. The value in this register is a number between 0 and 255
and is the sum of the individual bit weights as defined below.
Bit
Weight
Description
Text On
Response
Message
Default
Value
7
128
Under Voltage
UV
0
6
64
Over Voltage
OV
0
5
32
Over Temperature OT
0
4
16
—
—
0
3
8
Over Current
OC
0
2
4
Over Power
OP
0
1
2
Saturation
SAT
0
0
1
Module Fault
MOD FLT
0
Description
The query form of this command will either return a numeric or a
text response depending on the TEXT ON/OFF setting. The text
response will return a string containing the Text On Response
Message as listed above for each bit that is set. These will be
separated by commas. If no bits are set “ CLEAR” will be returned.
Command Syntax
LAT <NR1>
Example
LAT 12
This will write the value of 12 into the LAT register. This enables
bit 2 (Over Power) and bit 3 (Over Current) in the CON register so
that if either is set they will remain set until the CON register is read.
Since the Over Voltage and Over Temperature bits remain
unaffected these will remain enabled. Therefore the value in the
LAT after this command will be 108.
Query Syntax
LAT?
Returned Parameters TEXT ON: <text response string>
TEXT OFF: <NR1>
