diff --git a/api/__init__.py b/api/__init__.py
index 3eaedbf..cb32a38 100644
--- a/api/__init__.py
+++ b/api/__init__.py
@@ -98,3 +98,6 @@ from .s25_vertices import get_vertex_schema, get_vertex, set_vertex, add_vertex,
 from .s26_labels import get_label_schema, get_label, set_label, add_label, delete_label
 
 from .s27_backdrop import get_backdrop_schema, get_backdrop, set_backdrop
+
+from .s29_scada_model import SCADA_TYPE_PRESSURE, SCADA_TYPE_DEMAND, SCADA_TYPE_QUALITY, SCADA_TYPE_LEVEL, SCADA_TYPE_FLOW
+from .s29_scada_model import get_scada_model_schema, get_scada_model, set_scada_model, add_scada_model, delete_scada_model
\ No newline at end of file
diff --git a/api/s29_scada_model.py b/api/s29_scada_model.py
new file mode 100644
index 0000000..561914d
--- /dev/null
+++ b/api/s29_scada_model.py
@@ -0,0 +1,138 @@
+from .database import *
+from .s0_base import is_node, is_link
+
+SCADA_TYPE_PRESSURE = 'PRESSURE'
+SCADA_TYPE_DEMAND = 'DEMAND'
+SCADA_TYPE_QUALITY = 'QUALITY'
+SCADA_TYPE_LEVEL = 'LEVEL'
+SCADA_TYPE_FLOW = 'FLOW'
+
+def _check_model_id(name: str, cs: ChangeSet) -> bool:
+    if 'model_id' not in cs.operations[0]:
+        return True
+    if cs.operations[0]['model_id'] == None:
+        return True
+    model_id = cs.operations[0]['model_id']
+    return is_node(name, model_id) or is_link(name, model_id)
+
+
+def get_scada_model_schema(name: str) -> dict[str, dict[str, Any]]:
+    return { 'id'          : {'type': 'str'   , 'optional': False , 'readonly': True },
+             'x'           : {'type': 'float' , 'optional': False , 'readonly': False},
+             'y'           : {'type': 'float' , 'optional': False , 'readonly': False},
+             'device_id'   : {'type': 'str'   , 'optional': False , 'readonly': False},
+             'device_name' : {'type': 'str'   , 'optional': True  , 'readonly': False},
+             'address'     : {'type': 'str'   , 'optional': True  , 'readonly': False},
+             'sm_type'     : {'type': 'str'   , 'optional': True  , 'readonly': False},
+             'model_id'    : {'type': 'str'   , 'optional': True  , 'readonly': False} }
+
+
+def get_scada_model(name: str, id: str) -> dict[str, Any]:
+    sm = try_read(name, f"select * from scada_model where id = '{id}'")
+    if sm == None:
+        return {}
+    d = {}
+    d['id'] = str(sm['id'])
+    d['x'] = float(sm['x'])
+    d['y'] = float(sm['y'])
+    d['device_id'] = str(sm['device_id'])
+    d['device_name'] = str(sm['device_name']) if sm['device_name'] != None else None
+    d['address'] = str(sm['address']) if sm['address'] != None else None
+    d['sm_type'] = str(sm['type']) if sm['type'] != None else None
+    d['model_id'] = str(sm['model_id']) if sm['model_id'] != None else None
+    return d
+
+
+class ScadaModel(object):
+    def __init__(self, input: dict[str, Any]) -> None:
+        self.type = 'scada_model'
+        self.id = str(input['id'])
+        self.x = float(input['x'])
+        self.y = float(input['y'])
+        self.device_id = str(input['device_id'])
+        self.device_name = str(input['device_name']) if 'device_name' in input and input['device_name'] != None else None
+        self.address = str(input['address']) if 'address' in input and input['address'] != None else None
+        self.sm_type = str(input['sm_type']) if 'sm_type' in input and input['sm_type'] != None else None
+        self.model_id = str(input['model_id']) if 'model_id' in input and input['model_id'] != None else None
+
+        self.f_type = f"'{self.type}'"
+        self.f_id = f"'{self.id}'"
+        self.f_x = self.x
+        self.f_y = self.y
+        self.f_device_id = f"'{self.device_id}'"
+        self.f_device_name = f"'{self.device_name}'" if self.device_name != None else 'null'
+        self.f_address = f"'{self.address}'" if self.address != None else 'null'
+        self.f_sm_type = f"'{self.sm_type}'" if self.sm_type != None else 'null'
+        self.f_model_id = f"'{self.model_id}'" if self.model_id != None else 'null'
+
+    def as_dict(self) -> dict[str, Any]:
+        return { 'type': self.type, 'id': self.id, 'x': self.x, 'y': self.y, 'device_id': self.device_id, 'device_name': self.device_name, 'address': self.address, 'sm_type': self.sm_type, 'model_id': self.model_id }
+
+    def as_id_dict(self) -> dict[str, Any]:
+        return { 'type': self.type, 'id': self.id }
+
+
+def set_scada_model_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
+    old = ScadaModel(get_scada_model(name, cs.operations[0]['id']))
+    raw_new = get_scada_model(name, cs.operations[0]['id'])
+
+    new_dict = cs.operations[0]
+    schema = get_scada_model_schema(name)
+    for key, value in schema.items():
+        if key in new_dict and not value['readonly']:
+            raw_new[key] = new_dict[key]
+    new = ScadaModel(raw_new)
+
+    redo_sql = f"update scada_model set x = {new.f_x}, y = {new.f_y}, device_id = {new.f_device_id}, device_name = {new.f_device_name}, address = {new.f_address}, type = {new.f_sm_type}, model_id = {new.f_model_id} where id = {new.f_id};"
+    undo_sql = f"update scada_model set x = {old.f_x}, y = {old.f_y}, device_id = {old.f_device_id}, device_name = {old.f_device_name}, address = {old.f_address}, type = {old.f_sm_type}, model_id = {old.f_model_id} where id = {old.f_id};"
+
+    redo_cs = g_update_prefix | new.as_dict()
+    undo_cs = g_update_prefix | old.as_dict()
+
+    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])
+
+
+def set_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    if get_scada_model(name, cs.operations[0]['id']) == {}:
+        return ChangeSet()
+    if _check_model_id(name, cs) == False:
+        return ChangeSet()
+    return execute_command(name, set_scada_model_cmd(name, cs))
+
+
+def add_scada_model_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
+    new = ScadaModel(cs.operations[0])
+
+    redo_sql = f"insert into scada_model (id, x, y, device_id, device_name, address, type, model_id) values ({new.f_id}, {new.f_x}, {new.f_y}, {new.f_device_id}, {new.f_device_name}, {new.f_address}, {new.f_sm_type}, {new.f_model_id});"
+    undo_sql = f"delete from scada_model where id = {new.f_id};"
+
+    redo_cs = g_add_prefix | new.as_dict()
+    undo_cs = g_delete_prefix | new.as_id_dict()
+
+    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])
+
+
+def add_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    if get_scada_model(name, cs.operations[0]['id']) != {}:
+        return ChangeSet()
+    if _check_model_id(name, cs) == False:
+        return ChangeSet()
+    return execute_command(name, add_scada_model_cmd(name, cs))
+
+
+def delete_scada_model_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
+    old = ScadaModel(get_scada_model(name, cs.operations[0]['id']))
+
+    redo_sql = f"delete from scada_model where id = {old.f_id};"
+    undo_sql = f"insert into scada_model (id, x, y, device_id, device_name, address, type, model_id) values ({old.f_id}, {old.f_x}, {old.f_y}, {old.f_device_id}, {old.f_device_name}, {old.f_address}, {old.f_sm_type}, {old.f_model_id});"
+
+    redo_cs = g_delete_prefix | old.as_id_dict()
+    undo_cs = g_add_prefix | old.as_dict()
+
+    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])
+
+
+def delete_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    if get_scada_model(name, cs.operations[0]['id']) == {}:
+        return ChangeSet()
+    return execute_command(name, delete_scada_model_cmd(name, cs))
diff --git a/tjnetwork.py b/tjnetwork.py
index 39c4740..161ab8c 100644
--- a/tjnetwork.py
+++ b/tjnetwork.py
@@ -95,6 +95,12 @@ OPTION_QUALITY_CHEMICAL = api.OPTION_QUALITY_CHEMICAL
 OPTION_QUALITY_AGE = api.OPTION_QUALITY_AGE
 OPTION_QUALITY_TRACE = api.OPTION_QUALITY_TRACE
 
+SCADA_TYPE_PRESSURE = api.SCADA_TYPE_PRESSURE
+SCADA_TYPE_DEMAND = api.SCADA_TYPE_DEMAND
+SCADA_TYPE_QUALITY = api.SCADA_TYPE_QUALITY
+SCADA_TYPE_LEVEL = api.SCADA_TYPE_LEVEL
+SCADA_TYPE_FLOW = api.SCADA_TYPE_FLOW
+
 
 ############################################################
 # project
@@ -721,3 +727,24 @@ def set_backdrop(name: str, cs: ChangeSet) -> ChangeSet:
 ############################################################
 # end 28.[END]
 ############################################################
+
+
+############################################################
+# scada_model 29
+############################################################
+
+def get_scada_model_schema(name: str) -> dict[str, dict[str, Any]]:
+    return api.get_scada_model_schema(name)
+
+def get_scada_model(name: str, id: str) -> dict[str, Any]:
+    return api.get_scada_model(name, id)
+
+def set_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    return api.set_scada_model(name, cs)
+
+# example: add_scada_model(p, ChangeSet({'id': 'sm', 'x': 0.0, 'y': 10.0, 'device_id': 'sm_device'}))
+def add_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    return api.add_scada_model(name, cs)
+
+def delete_scada_model(name: str, cs: ChangeSet) -> ChangeSet:
+    return api.delete_scada_model(name, cs)