RS-232 Operation
Introduction. The command set of the EPS200 has been designed to provide
the
user with outstanding process flexibility. In addition to basic on and off
commands,
there are a wide range of reporting, configuration, and control commands.
All
EPS200 commands, except SO, WF and WT can be used in
immediate (direct)
mode, via RS-232.
High voltage control commands. The following commands control, and
adjust
parameters related to, the high voltage output.
| Command |
Description |
| CF |
Set high voltage compliance off |
| CN |
Set high voltage compliance on |
| OF |
High voltage output off |
| ON |
High voltage output on |
| SB |
Set output to default value |
| SC |
Set high voltage compliance window |
| SV |
Set high voltage set point |
| SI |
Set overcurrent trip point |
| RM |
Report maximum voltage |
| SH |
Shunt HV output |
| TP |
Toggle polarity |
| PP |
Set positive polarity |
| NP |
Set negative polarity |
Status information commands. The following commands provide status
information about
the unit, operating parameters or program condition.
| Command |
Description |
| ID |
Return software version |
| RS |
Return Status |
| RP |
Return program status |
| MI |
Measure current at terminals |
| MV |
Measure volts at terminals |
| RC |
Return compliance value |
| RI |
Return overcurrent trip point |
| RV |
Return voltage set point |
T1, T2 and T3 timer commands. The timer commands allow the user to
reset, load,
start and display the timer data. The EPS200 has three process timers.
Timer 1 (T1) is a user programmable timer that can be used as a general purpose
countdown
timer, when used in conjunction with the WT command. The resolution of T1
is one second.
It has a maximum time period of 59 minutes and 59 seconds.
Timer 2 tracks the period the high voltage has been on, since timer 2 was
last cleared,
using the C2 command. Timer 2 can be used as a chuck or chamber preventative
maintenance
timer. The resolution of T2 is one second. It has a maximum time period of
59,999 hours,
59 minutes and 59 seconds.
Timer 3 is the OEM high voltage on timer. This timer cannot be reset and
is used by the
manufacturer for MTBF information. The resolution of T3 is one minute. It
has a maximum
time period of 59,999 hours and 59 minutes.
| Command |
Description |
| C1 |
Clear timer 1 |
| ST |
Set timer 1 |
| RT |
Reload and start timer 1 |
| R1 |
Read timer 1 |
| C2 |
Clear timer 2 |
| R2 |
Read timer 2 |
| R3 |
Read timer 3 |
Digital output control. The EPS200 provides the user with two digital
output bits.
These bits are available to the user for emulating mechanical clamp interfaces
or for
other functions, as desired. The bits are identified as “clamp is up”
and “clamp is
down.” Both bits are sinking outputs capable of 24 VDC at 50 mA.
When a clamping operation is started, “Clamp is up” can be
cleared and
“Clamp is down” can be set active. When the clamping operation
is completed,
“Clamp is up” can be set and “Clamp is down” can be
cleared.
The user can set the auxiliary output bits to the desired state throughout
a program.
| Command |
Description |
| CU |
Clear clamp is up |
| CD |
Clear clamp is down |
| SU |
Set clamp is up |
| SD |
Set clamp is down |
|
