From 18a8b1d8ca2a7c2f8a84950a14eec3a32ffba92f Mon Sep 17 00:00:00 2001
From: tasp <markus.zolliker@psi.ch>
Date: Thu, 25 Aug 2022 14:57:31 +0200
Subject: [PATCH] ccu4flow: stop controlling when abs(dif) < tol/2

---
 tcl/drivers/ccu4flow.tcl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcl/drivers/ccu4flow.tcl b/tcl/drivers/ccu4flow.tcl
index 53189fb..aafd8fa 100644
--- a/tcl/drivers/ccu4flow.tcl
+++ b/tcl/drivers/ccu4flow.tcl
@@ -541,7 +541,7 @@ proc ccu4flow::ctrl {} {
         # force init of reg_hyst state
         sct regstate reg
         setstate reg_hyst
-      } elseif {$dif * [sct dir] <= 0} {
+      } elseif {$dif * [sct dir] <= 0 || abs($dif) < $tol * 0.5} {
         setstate within_tolerance
       } elseif {$now < $lastim + $period} {
         # wait