diff --git a/orchestrator/utils/orchestrator_functions.py b/orchestrator/utils/orchestrator_functions.py
index 505d079..de3530e 100644
--- a/orchestrator/utils/orchestrator_functions.py
+++ b/orchestrator/utils/orchestrator_functions.py
@@ -280,4 +280,10 @@ def build_tag_config(
         **tag,
     }
 
+    frequencies = [x['frequency'] for x in slot_config[f'{i}'][server_name]['tags'].values()]
+
+    min_frequency = min(frequencies) if frequencies else 500
+
+    slot_config[f"{i}"][server_name]['subscription_period_ms'] = min_frequency/2
+
     return slot_config
diff --git a/tests/orchestrator/utils/test_orchestrator_functions.py b/tests/orchestrator/utils/test_orchestrator_functions.py
index 628b2f8..5a1f64f 100644
--- a/tests/orchestrator/utils/test_orchestrator_functions.py
+++ b/tests/orchestrator/utils/test_orchestrator_functions.py
@@ -249,8 +249,8 @@ def test_gather_read_tags():
 
 
 def test_build_tag_config():
-    tag = {'server_id': '1', 'server_name': 'test_server_name', 'tag_address': 'test_tag_address'}
-    opc_servers = {'1': {'server_name': 'test_server_name', 'url': 'test_url', 'uri': 'test_uri'}}
+    tag = {'server_id': '1', 'server_name': 'test_server_name', 'tag_address': 'test_tag_address', 'frequency': 1000}
+    opc_servers = {'1': {'server_name': 'test_server_name', 'url': 'test_url', 'uri': 'test_uri', 'subscription_period_ms': 1000}}
     slot_config: dict = {'1': {}}
     i = 1
     result = build_tag_config(tag, slot_config, opc_servers, i)
@@ -264,11 +264,13 @@ def test_build_tag_config():
                 'cert_path': None,
                 'private_key_path': None,
                 'server_cert_path': None,
+                'subscription_period_ms': 500,
                 'tags': {
                     'test_tag_address': {
                         'server_id': '1',
                         'server_name': 'test_server_name',
                         'tag_address': 'test_tag_address',
+                        'frequency': 1000,
                     }
                 },
             }