From 43acc1d50cd983e1b9cb9c00149f32f158f2900d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20D=C3=B6rnen?= <christian.doernen@icloud.com>
Date: Wed, 18 Nov 2020 17:59:13 +0100
Subject: [PATCH] Disconnect when keep alive request fails

---
 src/index.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/index.js b/src/index.js
index d6c7d6d..903e7ae 100644
--- a/src/index.js
+++ b/src/index.js
@@ -126,6 +126,9 @@ class S7Client extends EventEmitter {
       // send a keep alive request every nth aliveCheck cycle
       if(this.opts.alivePkgCycl !== false && cnt >= this.opts.alivePkgCycle) {
         this.client.PlcStatus((err, res) => {
+          if(err) {
+            this.client.Disconnect();
+          }
         });
         cnt = 0;
       }