diff --git a/iocBoot/iocvxWorks/pid_slow.substitutions b/iocBoot/iocvxWorks/pid_slow.substitutions
index dbe8f24c7aaf349b42145701a19638be86baad61..cda5bbb4071cb501fc7506885ea70b1a33b960b5 100755
--- a/iocBoot/iocvxWorks/pid_slow.substitutions
+++ b/iocBoot/iocvxWorks/pid_slow.substitutions
@@ -1,7 +1,9 @@
+# This file demonstrates slow feedback.  The initial INP and OUT assume the first channel
+# of an IP330 ADC connected to the first channel of a DAC128V DAC.
 file "$(STD)/stdApp/Db/pid_control.db"
 {
 pattern
-{P,      PID,       INP,           OUT,    LOPR,  HOPR,  DRVL,  DRVH,  PREC,   KP,  KI,   KD,  SCAN}
-{xxx:, PID1,  DMM1Ch3_calc.VAL, DAC1_1,   0,    100,     0,    5,     3,     0.2,  3.,   0.,  ".1 second"}
+{P,      PID,              INP,        OUT, LOPR,   HOPR,  DRVL, DRVH,  PREC,      KP,  KI,   KD,  SCAN}
+{xxx:,   pid_slow, xxx:IP300_1, xxx:DAC3_1,    0,    100,     0,    5,     3,     0.2,  3.,   0.,  ".1 second"}
 }