Commit ec3b3699 authored by Marius Harjoi's avatar Marius Harjoi

Error mask should be added with or

parent aeb710d8
......@@ -101,7 +101,7 @@ namespace AMWD.Modbus.Tcp.Protocol
var fn = (byte)Function;
if (IsError)
{
fn = (byte)(fn & Consts.ErrorMask);
fn = (byte)(fn | Consts.ErrorMask);
buffer.AddByte((byte)ErrorCode);
}
else
......
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