# Micrologix 1100 Series A

**URL:** <https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043>\
**Category:** Ignition\
**Created:** [March 16, 2013, 6:00am UTC](https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043 "2013-03-16T06:00:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![zackscriven](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zackscriven/32/7213_2.png) [@zackscriven](https://forum.inductiveautomation.com/u/zackscriven)\
**Post date:** [March 16, 2013, 6:00am UTC](https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043/1 "2013-03-16T06:00:35Z")

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i cannot get my micrologix series a to connect to ignition.

is it because the subnet has been changed since the gateway is installed?

i can currently ping the ml1100 from the host computer.

any ideas??

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<div class="post-metadata">

**Author:** ![zackscriven](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zackscriven/32/7213_2.png) [@zackscriven](https://forum.inductiveautomation.com/u/zackscriven)\
**Post date:** [March 16, 2013, 6:02am UTC](https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043/2 "2013-03-16T06:02:38Z")

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sorry this is under the wrong topic

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<div class="post-metadata">

**Author:** ![zackscriven](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zackscriven/32/7213_2.png) [@zackscriven](https://forum.inductiveautomation.com/u/zackscriven)\
**Post date:** [March 17, 2013, 1:23am UTC](https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043/3 "2013-03-17T01:23:39Z")

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I was able to swap the ML1100 for a series B processor 1763-L16BBB Firmware 9 and it connected.

Has anyone else had a problem connecting to an older Micrologix series A firmware 3?  
is this supported? or do i need to flash the firmware

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**Author:** ![dkarlin](https://avatars.discourse-cdn.com/v4/letter/d/54ee81/32.png) [@dkarlin](https://forum.inductiveautomation.com/u/dkarlin)\
**Post date:** [March 18, 2013, 12:25pm UTC](https://forum.inductiveautomation.com/t/micrologix-1100-series-a/6043/4 "2013-03-18T12:25:14Z")

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You might try upgrading the firmware to series B, as the A only allows one ethernet connection.