# Sum\_F does not show the Block Parameters

**URL:** <https://scilab.discourse.group/t/sum-f-does-not-show-the-block-parameters/1166>\
**Category:** General usage\
**Created:** [June 4, 2026, 1:53pm UTC](https://scilab.discourse.group/t/sum-f-does-not-show-the-block-parameters/1166 "2026-06-04T13:53:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![greenguy](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@greenguy](https://scilab.discourse.group/u/greenguy)\
**Post date:** [June 4, 2026, 1:53pm UTC](https://scilab.discourse.group/t/sum-f-does-not-show-the-block-parameters/1166/1 "2026-06-04T13:53:11Z")

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Scilab Version 2024

OS: LMint 22.3

Right Click on sum\_f and selecting Block Parameters a box tries to open but immediately closes fast enough that nothing in the box is seen. So the number of ports and any other parameters cannot be changed.

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<div class="post-metadata">

**Author:** ![davidcl](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/davidcl/32/1029_2.png) [@davidcl](https://scilab.discourse.group/u/davidcl)\
**Post date:** [June 15, 2026, 6:48am UTC](https://scilab.discourse.group/t/sum-f-does-not-show-the-block-parameters/1166/2 "2026-06-15T06:48:38Z")

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Hello,

The SUM\_f block has no parameters, it only makes the `+` operation on scalar double.

 ![image](https://global.discourse-cdn.com/free1/uploads/utc/original/2X/e/ee0270e024cfe87f8f008f796f4539917bda5e63.png)

Use the SUMMATION block to have gain on each port and advanced parameters.