created config file in the new format

fixed a bug in the vlimit

cfg/addons/vsource_cfg.py

@@ -0,0 +1,43 @@
+Node('k2601b.psi.ch',
+     'source meter keithley 2601b',
+     interface='tcp://5000',
+)
+
+
+Mod('vsource_io',
+    'frappy_psi.k2601b.K2601bIO',
+    'source meter',
+    uri = '129.129.156.90:5025',
+)
+
+
+Mod('source',
+    'frappy_psi.k2601b.SourceMeter'
+    '',
+    description = "keithley sourcemeter",
+    mode = 1,
+    vlimit = 6.0,
+    ilimit = 2.,
+    io = 'vsource_io',
+)
+
+Mod('volt',
+    'frappy_psi.k2601b.Voltage'
+    '',
+    description = "Voltage Source",
+    active = True,
+    limit = 5.0,
+    target = 0.0,
+    sourcemeter = 'source',
+    io = 'vsource_io',
+)
+Mod('cur',
+    'frappy_psi.k2601b.Current'
+    '',
+    description = "Current Source",
+    active = False,
+    limit = 0.10,
+    target = 0.0,
+    sourcemeter = 'source',
+    io = 'vsource_io',
+)