Siemens S5 Nodes

Read and write Siemens SIMATIC S5 PLCs from pipelines, by S5 address, through an S7 gateway or a CP 1430. Each operation has its own node in the Pipeline Designer: S5 Read and S5 Write.

For connection setup, the addresses and per-function fields, see the Siemens S5 connection guide.

Configuration Quick Reference

Field	What you choose	Details
Parameters	Connection, Function, Function Parameters, Timeout Override	Select the S5 connection profile, pick a function, bind parameters with expression support, and optionally override the timeout.
Settings	Description, Timeout (seconds), Retry on Timeout, Retry on Fail, On Error	Node description, maximum execution time, retry behaviour on timeout or failure, and error strategy. All execution settings default to pipeline-level values.

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S5 Read Node

Read many named points, each by its S5 address, in the fewest requests. Runs an s5.read function.

Node Configuration

Parameter	Type	Required	Description
Connection	Selection	Yes	S5 connection profile to use
Function	Selection	Yes	An s5.read function from the selected connection
Function Parameters	Dynamic	Varies	The points list. See Read Points.
Timeout Override	Number (seconds)	No	Override the default function timeout

Output Structure

{
  "result": {
    "count": 2,
    "values": { "speed": 100.0, "pump": true },
    "quality": "good",
    "totalDataPoints": 2,
    "totalReads": 2
  },
  "_metadata": { "success": true, "functionId": "<function-id>", "durationMs": 7, "timestamp": "2026-10-01T08:30:00Z" }
}

Field	Type	Description
result.values	object	Every point by its name, typed by its address: a boolean for a bit; a number for a byte, word, double word, KG value, timer (milliseconds) or counter
result.count	number	How many points were decoded
result.quality	string	good: a refusal from the S5 fails the node instead of storing a value
result.totalDataPoints	number	How many points were requested
result.totalReads	number	How many reads of the S5's memory the points were grouped into

{{ $node["S5 Read"].result.values.speed }}

How points are grouped

Points are grouped by area (inputs, outputs, flags, timers, counters) and by data block; within a group, neighbours within 32 bytes are read together, up to 255 bytes a read. totalReads shows how many reads the node used.

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S5 Write Node

Write one value to a data block item (DB10.DW4, DB10.DD4:KG, DB10.D4.15), a flag (M10.2, MW10) or an output (A4.0, AW4). Runs an s5.write function.

Inputs, timers and counters are refused: the CPU reads its inputs in every cycle, and timers and counters run in the program. A single bit, or one byte of a data word, is written by reading its byte or word, changing it and writing it back. A write is sent once: the node does not repeat it when the S5 does not answer, and it does not run in a pipeline started by a late (replayed) input.

Node Configuration

Parameter	Type	Required	Description
Connection	Selection	Yes	S5 connection profile to use
Function	Selection	Yes	An s5.write function from the selected connection
Function Parameters	Dynamic	Varies	address and value, both of which support ((paramName)) templates. See Write Point.
Timeout Override	Number (seconds)	No	Override the default function timeout

Output Structure

{
  "result": {
    "address": "DB10.DW4",
    "dataType": "WORD",
    "value": 750
  },
  "_metadata": { "success": true, "functionId": "<function-id>", "durationMs": 6, "timestamp": "2026-10-01T08:30:00Z" }
}

Field	Type	Description
result.address	string	The S5 address written
result.dataType	string	The type the address holds: BIT, BYTE, WORD, INT, DWORD, DINT or KG
result.value	any	The value written

A write to an input, timer or counter, or a value the address cannot hold (70000 for a WORD), fails the node before anything is sent to the S5.

Safety first

Validate values in a Condition node before writing to equipment. A flag or data word the program reads can start a motor or open a valve immediately.

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Settings Tab

Both S5 node types share the same Settings tab:

Setting	Type	Default	Description
Description	Text	—	Optional description displayed on the node
Timeout (seconds)	Number	Pipeline default	Maximum time the node may run before timing out
Retry on Timeout	Toggle	Pipeline default	Automatically retry the node if it times out
Retry on Fail	Toggle	Pipeline default	Automatically retry the node if it fails
On Error	Selection	Pipeline default	Error strategy: Pipeline Default (the pipeline's Error Handling setting), Stop Pipeline or Continue Execution

When left at their defaults, these settings inherit from the pipeline-level execution configuration.