diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99fbe6ed..ca01a52f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - replaced true with 1 in SQL statements of myems-api.
 - updated user insert sql statement for failed_login_count.
 - updated icons for vertical menu items.
+- updated acquisition procedure of myems-modbus-tcp.
 
 ### Fixed
 - fixed typo in virtualmetercarbon.
diff --git a/myems-modbus-tcp/acquisition.py b/myems-modbus-tcp/acquisition.py
index d0f49dc7..83c1bf6f 100644
--- a/myems-modbus-tcp/acquisition.py
+++ b/myems-modbus-tcp/acquisition.py
@@ -194,18 +194,15 @@ def process(logger, data_source_id, host, port):
                     value = result[0]
 
                 if point['object_type'] == 'ANALOG_VALUE':
-                    analog_value_list.append({'data_source_id': data_source_id,
-                                              'point_id': point['id'],
+                    analog_value_list.append({'point_id': point['id'],
                                               'is_trend': point['is_trend'],
                                               'value': Decimal(value) * point['ratio']})
                 elif point['object_type'] == 'ENERGY_VALUE':
-                    energy_value_list.append({'data_source_id': data_source_id,
-                                              'point_id': point['id'],
+                    energy_value_list.append({'point_id': point['id'],
                                               'is_trend': point['is_trend'],
                                               'value': Decimal(value) * point['ratio']})
                 elif point['object_type'] == 'DIGITAL_VALUE':
-                    digital_value_list.append({'data_source_id': data_source_id,
-                                               'point_id': point['id'],
+                    digital_value_list.append({'point_id': point['id'],
                                                'is_trend': point['is_trend'],
                                                'value': int(value) * int(point['ratio'])})