Treat exception codes as valid responses (pymodbus-dev#662)

camtarn · Oct 17, 2021 · 69cfefe · 69cfefe
1 parent 52037bf
commit 69cfefe
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pymodbus/transaction.py b/pymodbus/transaction.py
@@ -123,7 +123,7 @@ def _validate_response(self, request, response, exp_resp_len):
             return False
 
         mbap = self.client.framer.decode_data(response)
-        if mbap.get('unit') != request.unit_id or mbap.get('fcode') != request.function_code:
+        if mbap.get('unit') != request.unit_id or mbap.get('fcode') & 0x7F != request.function_code:
             return False
 
         if 'length' in mbap and exp_resp_len: