Process limit

Defines the range a work centre, machine, or site is expected to run at for one measurement.

For example, a welding procedure's current window, a tempering temperature, a plating bath range, or the coolant concentration of a turning cell can each be registered as a Process limit. In the Excel template, process limits are registered on the Process and shop limits sheet.

Process limits are versioned: each limit applies from its from date until a newer limit for the same place and measurement replaces it.

The Process limit object

{
  "where": "TURN-CELL-01",
  "measure": "coolant-concentration",
  "min": 6,
  "target": 7,
  "max": 8,
  "unit": "%",
  "from": "2026-09-01T00:00:00+02:00"
}

Fields

Rules

• where must be the code of an existing work centre, machine, or site. Pulse looks it up among work centres first, then machines and sites, and uses the first match.
• measure must be a code from What you measure.
• unit is required and must match the unit of the measurement. Upper and lower case are not distinguished.
• At least one of min, target, and max is required.
• Submitting a limit with the same where, measure, and from replaces it. A limit with a later from adds a new version and keeps the earlier ones.

How values are read back

Pulse stores the values you send without labelling which one is the minimum, the target, or the maximum. When you read a limit back, the values are assigned by how many you sent:

For example, a limit sent with only min and target is read back with those values as min and max. To get back exactly what you sent, send either target alone, min and max, or all three.

Process limits and other expectations

Process limits apply to where work is done. Other expectations are defined elsewhere:

• Changeover times between setup families: Setup rules.
• Tolerances of a part's features: Features.

API resource

API methods

Create a process limit

POST /manufacturing/metal-machining/v1/process-limits/insert

Creates a Process limit, or replaces the limit with the same where, measure, and from.

Request

POST /manufacturing/metal-machining/v1/process-limits/insert
Content-Type: application/json

{
  "where": "TURN-CELL-01",
  "measure": "coolant-concentration",
  "min": 6,
  "target": 7,
  "max": 8,
  "unit": "%",
  "from": "2026-09-01T00:00:00+02:00"
}

Parameters

Update a process limit

PUT /manufacturing/metal-machining/v1/process-limits/update

Replaces the values of the limit identified by where, measure, and from. If no such limit exists, it is created.

Request

PUT /manufacturing/metal-machining/v1/process-limits/update
Content-Type: application/json

{
  "where": "TURN-CELL-01",
  "measure": "coolant-concentration",
  "min": 6.5,
  "target": 7,
  "max": 8,
  "unit": "%",
  "from": "2026-09-01T00:00:00+02:00"
}

Parameters

The parameters are the same as for creating a process limit.

Patch a process limit

PATCH /manufacturing/metal-machining/v1/process-limits/patch

Partially updates an existing Process limit.

The limit is identified by properties.where, properties.measure, and properties.from. All three are required. Fields you leave out keep their current values. min, target, and max can be cleared by sending them as null, as long as one value remains.

Request

PATCH /manufacturing/metal-machining/v1/process-limits/patch
Content-Type: application/json

{
  "properties": {
    "where": "TURN-CELL-01",
    "measure": "coolant-concentration",
    "from": "2026-09-01T00:00:00+02:00",
    "max": 8.5
  }
}

Parameters

Retrieve a process limit

GET /manufacturing/metal-machining/v1/process-limits/select

Returns the limit identified by where, measure, and from. If no limit matches, the response is empty. An unknown where is refused.

Request

GET /manufacturing/metal-machining/v1/process-limits/select?where=TURN-CELL-01&measure=coolant-concentration&from=2026-09-01T00:00:00%2B02:00

Query parameters

List process limits

GET /manufacturing/metal-machining/v1/process-limits/query

Returns Process limits matching the supplied filters. Without inForceAt, every version is returned.

Request

GET /manufacturing/metal-machining/v1/process-limits/query?where=TURN-CELL-01&inForceAt=2026-09-15T00:00:00%2B02:00

Query parameters

Delete a process limit

DELETE /manufacturing/metal-machining/v1/process-limits/delete

Deletes the limit identified by where, measure, and from. If no limit matches, nothing happens. An unknown where is refused.

Request

DELETE /manufacturing/metal-machining/v1/process-limits/delete?where=TURN-CELL-01&measure=coolant-concentration&from=2026-09-01T00:00:00%2B02:00

Query parameters