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Using 72-Channel
Using 36-Channel
Simultaneous/
Stepped
Actuations
Pulsed/
Continuous
16 Getting Started
Set 72-channel mode by leaving CNFG 0 open. For 72-channel mode
operation, use OPEN <channel_list> to open channel(s) and thus not sink
Mode
current, and CLOSe <channel_list> to close channel(s) and sink current.
Use SCAN <channel_list> to scan channels.
When switching channel(s) (using OPEN <channel_list> or CLOSe
<channel_list>), drivers are actuated essentially simultaneously (less than
100 sec) if more than one channel is specified in the channel list. When
scanning channels (using SCAN <channel_list>), there is a 60 msec delay
time between actuation of each channel in the SCAN channel_list. This time
includes 30 msec to close the channel pair, and another 30 msec to open the
channel pair before moving to the next channel pair.
Set 36-channel mode by connecting CNFG 0 to GROUND. For 36-channel
mode, four operations are available: simultaneous or stepped actuations and
Mode
pulsed or continuous outputs. The term "channel pair" refers to the SET and
RESET parts of the channel, such as CH0 SET and CH0 RESET.
For 36-channel mode, use the CNFG 1 bit to set simultaneous or stepped
actuations. Leave CNFG 1 open to set simultaneous actuations or connect
CNFG 1 to GROUND to set stepped actuations.
When switching channel pairs with simultaneous actuation, channel pairs
(SET/ RESET) are actuated essentially simultaneously (less than 100 sec)
if more than one channel is specified in OPEN <channel_list> or CLOSe
<channel_list>. However, for more than one channel in the channel list,
actuation order is not guaranteed.
When switching channel pairs with stepped actuation, an OPEN or CLOSe
command waits for the internal 30 msec timer to interrupt between each
channel pair. For the OPEN and CLOSe commands, the timer indicates
completion of a relay actuation (caused by the driver). The instrument will
wait for the time to elapse (causing an IRQ) before the next command is
executed. On a *RST, up to six relays may be actuated at a time.
When scanning channel pairs with SCAN <channel_list>, a 60 msec delay
occurs between actuations of each channel pair in the channel list for either
simultaneous or stepped actuation. This time includes 30 msec to close the
channel pair, and another 30 msec to open the channel pair before moving to
the next channel pair.
For 36-channel mode, use the CNFG 2 bit to set pulsed or continuous output.
Leave CNFG 2 open to set continuous output or connect CNFG 2 to
GROUND to set pulsed output. With continuous output (for both switching
Output
and scanning channels), when a channel pair is actuated the SET or RESET
output current is continuously applied to the channel pair.
With pulsed output (for both switching and scanning channels), when a
channel pair is actuated the SET or RESET current is applied until the 30
msec timer indicates the channel has finished moving. The current is then
removed, and another 30 msec wait occurs. Pulsed output requires twice as
much time as continuous output to complete the operation. On a *RST,
up to six relays may be actuated at a time with pulsed output.
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