diff --git a/src/utils/flowExecution.js b/src/utils/flowExecution.js
index 5f06015..9767f96 100644
--- a/src/utils/flowExecution.js
+++ b/src/utils/flowExecution.js
@@ -80,6 +80,7 @@ export const loadFlowItemScopedRuntimeRoles = async (items = []) => {
       roleKey: `${item.itemId}:${occurrence}:${role.roleKey}`,
       sourceRoleKey: role.roleKey,
       itemId: item.itemId,
+      itemOccurrence: occurrence,
       itemName: item.itemName || String(item.itemId),
       displayName: `${item.itemName || item.itemId} / ${role.displayName}`,
     }))
@@ -103,6 +104,7 @@ export const createRuntimeAssignments = (roles = [], primaryRobotId = '') => rol
   roleKey: role.roleKey,
   ...(role.sourceRoleKey ? { sourceRoleKey: role.sourceRoleKey } : {}),
   ...(role.itemId != null ? { itemId: role.itemId } : {}),
+  ...(role.itemOccurrence != null ? { itemOccurrence: role.itemOccurrence } : {}),
   members: [{
     memberKey: `${role.roleKey}_1`,
     robotId: index === 0 ? primaryRobotId || role.legacyRobotId || '' : role.legacyRobotId || '',
diff --git a/src/views/flow/components/RuntimeAssignmentsEditor.vue b/src/views/flow/components/RuntimeAssignmentsEditor.vue
index 0876c1d..1fc7dc9 100644
--- a/src/views/flow/components/RuntimeAssignmentsEditor.vue
+++ b/src/views/flow/components/RuntimeAssignmentsEditor.vue
@@ -156,6 +156,7 @@ const initialize = async () => {
       roleKey: role.roleKey,
       ...(role.sourceRoleKey ? { sourceRoleKey: role.sourceRoleKey } : {}),
       ...(role.itemId != null ? { itemId: role.itemId } : {}),
+      ...(role.itemOccurrence != null ? { itemOccurrence: role.itemOccurrence } : {}),
       members: [{
         ...existingMember,
         memberKey: `${role.roleKey}_1`,
@@ -182,7 +183,12 @@ const validate = () => {
       if (slot.required && !member.devices[slot.slotKey]) return `请为“${role.displayName}”选择“${slot.displayName}”`
       const deviceId = member.devices[slot.slotKey]
       if (!deviceId) continue
-      const physicalKey = `${member.robotId}:${deviceId}`
+      // 不同检测项按顺序独立执行，可以复用同一台机器人及其设备。
+      // 仅同一检测项内部的多个角色/用途需要遵守设备复用规则。
+      const itemScope = role.itemId == null
+        ? 'task'
+        : `${role.itemId}:${role.itemOccurrence || 1}`
+      const physicalKey = `${itemScope}:${member.robotId}:${deviceId}`
       const existingUse = physicalDeviceUses.get(physicalKey)
       if (existingUse && (!slot.allowReuse || !existingUse.allowReuse)) {
         return `“${existingUse.roleName} / ${existingUse.slotName}”和“${role.displayName} / ${slot.displayName}”不能使用同一个设备`
diff --git a/src/views/flow/components/params/DeviceUniversal.vue b/src/views/flow/components/params/DeviceUniversal.vue
index 6995dc3..acf0265 100644
--- a/src/views/flow/components/params/DeviceUniversal.vue
+++ b/src/views/flow/components/params/DeviceUniversal.vue
@@ -356,21 +356,28 @@ const deleteTopLevelItem = (fullPath, propPath) => {
  * 初始化 initData 对应的数据或交互；作用范围仅限当前组件或模块。
  */
 const initData = () => {
-    const nodeParams = JSON.parse(JSON.stringify(props.data.properties.nodeParams || []))
-    const outputParams = JSON.parse(JSON.stringify(props.data.properties.outputParams || []))
+    const properties = props.data?.properties || {}
+    const nodeParams = JSON.parse(JSON.stringify(properties.nodeParams || []))
+    const outputParams = JSON.parse(JSON.stringify(properties.outputParams || []))
     formData.nodeParams = nodeParams;
     formData.outputParams = outputParams;
-    formData.executionTarget = JSON.parse(JSON.stringify(props.data.properties.executionTarget || {}));
-    const codeParams = props.data.properties.nodeParams.find(item => item.name === 'requestJson')
+    formData.executionTarget = JSON.parse(JSON.stringify(properties.executionTarget || {}));
+    const codeParams = nodeParams.find(item => item.name === 'requestJson')
     if (codeParams) {
-    setTimeout(() => {
+      nextTick(() => {
         if (editorInstance) {
-            setValue(codeParams.input)
+          setValue(codeParams.input)
         }
-    }, 100)
+      })
     }
 }
 
+watch(
+  () => props.data,
+  initData,
+  { immediate: true, deep: true }
+)
+
 // 保存验证
 /**
  * 校验 validateAndSave 对应的数据或交互；作用范围仅限当前组件或模块。
@@ -420,7 +427,8 @@ const validateAndSave = async () => {
 onMounted(() => {
   nextTick(() => {
     initEditor('requestJson')
-    initData()
+    const codeParams = formData.nodeParams.find(item => item.name === 'requestJson')
+    if (codeParams) setValue(codeParams.input)
   })
 })
 
diff --git a/src/views/flow/components/params/RobotExecutionTarget.vue b/src/views/flow/components/params/RobotExecutionTarget.vue
index 5cf6cb2..b87c223 100644
--- a/src/views/flow/components/params/RobotExecutionTarget.vue
+++ b/src/views/flow/components/params/RobotExecutionTarget.vue
@@ -79,7 +79,7 @@ const handleRoleChange = () => {
   emitTarget()
 }
 
-const init = () => {
+const syncFromModel = () => {
   roles.value = getResourceRoles()
   const value = props.modelValue || {}
   localTarget.roleKey = roles.value.some((role) => role.roleKey === value.roleKey)
@@ -88,10 +88,13 @@ const init = () => {
   localTarget.dispatchPolicy = value.dispatchPolicy || 'ONE'
   deviceSlotKey.value = value.deviceSlotKey || value.deviceBindings?.[0]?.slotKey || ''
   selectDefaultSlot()
-  emitTarget()
 }
 
-watch(() => props.data.id, init, { immediate: true })
+watch(
+  [() => props.data.id, () => props.modelValue],
+  syncFromModel,
+  { immediate: true, deep: true }
+)
 </script>
 
 <style scoped lang="scss">