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Allow output voltage to be ramped on Keysight PS

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This commit is contained in:
Douglas Clowes
2014-12-12 14:27:40 +11:00
parent c61cb22270
commit b81b226fe8
1 changed files with 84 additions and 4 deletions
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88
site_ansto/instrument/config/environment/keysight_N8740A.sct
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@ -21,13 +21,26 @@ driver keysight_N8740A = {
units = 'V'; units = 'V';
} }
var setpoint = { var setpoint = {
readable = 1; read_command = 'SOURCE:VOLTAGE?'; readable = 1; fetch_function = read_setpoint; read_command = 'SOURCE:VOLTAGE?';
writeable = 1; write_command = 'SOURCE:VOLTAGE '; writeable = 1; write_function = write_setpoint; write_command = 'SOURCE:VOLTAGE ';
driveable = setpoint; driveable = working_setpoint;
tolerance = 1; tolerance = 1; property settle_time = 5;
lowerlimit = 0; upperlimit = 150; lowerlimit = 0; upperlimit = 150;
units = 'V'; units = 'V';
} }
var ramp_rate = {
type = float;
value = 1.0;
units = 'V/S';
writeable = 1; write_function = write_direct;
lowerlimit = 0; upperlimit = 15;
}
var working_setpoint = {
type = float;
readable = 1; read_command = 'SOURCE:VOLTAGE?';
writeable = 1; write_function = write_direct;
units = 'V';
}
} }
group current = { group current = {
type = float; type = float;
@ -76,4 +89,71 @@ driver keysight_N8740A = {
set cmd "${cmd_str}${par}@@NOREPLY@@" set cmd "${cmd_str}${par}@@NOREPLY@@"
@END @END
} }
code write_direct = {
@TCL
set cmd "@@NOSEND@@"
sct result ""
if { [sct target] != [sct oldval] } {
debug_log ${tc_root} 1 "[sct] changed to new:[sct target], from old:[sct oldval]"
sct oldval [sct target]
sct update [sct target]
sct utime readtime
}
@END
}
code write_setpoint = {
@TCL
set cmd "@@NOSEND@@"
sct result ""
sct ramp_start_time [sct utime]
sct ramp_start_value [hval ${tc_root}/working_setpoint]
sct ramp_rate_value [hval ${tc_root}/ramp_rate]
if { [sct target] != [sct oldval] } {
debug_log ${tc_root} 1 "[sct] changed to new:[sct target], from old:[sct oldval]"
sct oldval [sct target]
sct update [sct target]
sct utime readtime
}
@END
}
code read_setpoint = {
@TCL
if { [hpropexists [sct] target] } {
set target [sct target]
if { [hval ${tc_root}/working_setpoint] != ${target} } {
set elapsed_time [expr {[sct utime] - [sct ramp_start_time]}]
debug_log ${tc_root} 1 "read_setpoint elapsed_time = ${elapsed_time}"
if {[hpropexists [sct] ramp_rate_value] && [sct ramp_rate_value] > 0.0} {
set ramped_value [expr {[sct ramp_rate_value] * ${elapsed_time}}]
debug_log ${tc_root} 1 "read_setpoint ramped_value = ${ramped_value}"
if { ${target} > [hval ${tc_root}/working_setpoint] } {
set working_setpoint [expr {[sct ramp_start_value] + ${ramped_value}}]
debug_log ${tc_root} 1 "read_setpoint working_setpoint+ = ${working_setpoint}"
if { ${working_setpoint} > ${target} } {
set working_setpoint ${target}
}
} else {
set working_setpoint [expr {[sct ramp_start_value] - ${ramped_value}}]
debug_log ${tc_root} 1 "read_setpoint working_setpoint- = ${working_setpoint}"
if { ${working_setpoint} < ${target} } {
set working_setpoint ${target}
}
}
} else {
set working_setpoint ${target}
debug_log ${tc_root} 1 "read_setpoint working_setpoint = ${working_setpoint}"
}
if {![hpropexists [sct] ramp_rate_value] || [sct ramp_rate_value] != [hval ${tc_root}/ramp_rate]} {
sct ramp_start_time [sct utime]
sct ramp_start_value [hval ${tc_root}/working_setpoint]
sct ramp_rate_value [hval ${tc_root}/ramp_rate]
}
set cmd "SOURCE:VOLTAGE ${working_setpoint}@@NOREPLY@@"
sct result [hval ${tc_root}/working_setpoint]
}
} else {
# cmd is fine
}
@END
}
} }