Stasis

Stasis lock is a critical state of being for Transformers. Stasis lock is a sort of coma that allows a Transformer to stay alive, running at the lowest level of power despite massive energy loss or traumatic damage. It is comparable to the sleep mode of a computer.

Sometimes, it benefits Cybertronians, especially if they are tired or injured.

The Covenant of Primus
To defeat Unicron, the Thirteen concocted a plan where the youngest of their number, Optimus Prime, would enter the Chaos-Bringer and expose his Primus-like spark to Unicron's anti-spark, the resulting interaction knocking both into stasis lock. While Optimus was revived by Quintus Prime's Emberstone, Vector Prime created a time-loop around Unicron with the intent of leaving him comatose forever.

When the Great Cataclysm struck Cybertron the few Primes left rounded up as many survivors as they could and led them underground to wait out the out cataclysm in protective caves where they instructed their followers on how to enter stasis. Left on the surface by Prima, the Predaconsattempted to fly to safety before vague instinctual knowledge of stasis lock kicked in and they attempted to seek shelter underground.

Transformers: Fall of Cybertron
After being attacked by a swarm of Insecticons, Sludge was badly damaged and forced to enter stasis lock. His body was discovered by Jazz and Cliffjumper.

Masters and Students
Skyquake was in stasis until Starscream and Soundwave awakened him by placing an energon cube inside his stasis chamber. When Starscream found Megatron floating in space, he had no choice but to bring his master to the warship where they immediately put his body into stasis.

Scrapheap
Scraplets were in stasis until they were brought into the Autobot base. They eventually broke out of their pod and would of nearly destroyed the base if wasn't for the humans saving their robot friends.

T.M.I.
Bulkhead was put in stasis by Ratchet to examine the data that was stored into his head. Ratchet examined Bulkhead again after the data was gone from his mind. Bulkhead woke up from stasis when Miko played their favorite song on her guitar.

One Shall Rise, Part 1
Unicron awakens from stasis when the planetary alignment aligns planets in a straight motion, thus making him awake from inside Earth.

One Shall Rise, Part 3
Unicron was out back into stasis after Optimus used the matrix on his spark.

Orion Pax, Part 2
An Insecticon awakens from stasis in its stasis pod and follows Jack and Arcee on Cybertron.

Operation: Bumblebee, Part 2
Bumblebee awakens from stasis after he fell off a cliff in Operation: Bumblebee, Part 1.

Armada
Arcee traps Airachnid in an Insecticon stasis pod.

Flying Mind
The possessed Nemesis uses its stasis beam to put Bumblebee, Arcee, Bulkhead, Optimus Prime, Megatron, Dreadwing, Soundwave, Knock Out and the Vehicons in stasis. They were out of it when the Humans stopped the possessed Warship.

Hurt
Bulkhead was put in stasis by Ratchet when he was severely injured by Hardshell and exposed by Tox-En.

New Recruit
Smokescreen explained to Optimus Prime, Ratchet, Arcee and Bumblebee that he arrived on Earth in a Decepticon escape pod because he was captured aboard and went into stasis. He woke up from stasis when they found him.

Darkmount, NV
After Optimus was crushed by the Decepticons blowing up the Autobot base, he went into stasis after he was saved by Smokescreen from being captured by the Decepticons.

Rebellion
Optimus went into deep stasis and saw Alpha Trion's spirit in the AllSpark. Alpha Trion tried to convince Optimus to join the AllSpark, but Smokescreen was able to use the Forge of Solus Prime to revive Optimus in a new body.

Thirst
Airachnid awoke from her stasis pod when Silas infected her with Dark Energon and turned her into another Terrorcon.

Evolution
The Predacon clones in Shockwave's lab on Earth were in their stasis pods in their C.N.A until Wheeljack used one of his bombs to destroy them with Ultra Magnus's approval. Predaking was very mad about this and attacked them. Luckily Optimus Prime saved them from Predaking's wrath.

Minus One
Soundwave went into stasis when he was captured by the Autobots. He woke up when Laserbeak tracked Agent Fowler in his car and attached itself to Soundwave's chest, thus waking him up.

Predacons Rising
Unicron woke up from stasis and used Megatron's body as his vessel to destroy Cybertron. His plans were foiled as the alliance of Autobots, Predacons and Knock Out stopped him with Optimus Prime trapping Unicron inside the AllSpark's container.