@notimagain The Panzerhaubitzen 2000 is after my time, but many principles remain unchanged. I have googled it and Wikipedia (which I find more accurate than not). It is a big beast and can carry 60 x 155mm rounds to be fired in quick succession. The Wikipedia article is Here
It contains the following paragraph which I think is relevant and I have emboldened the important bits. There are 12 on their way to Ukraine, but realistically may already be there.
Mission Profile
The mission profile of the PzH 2000 was primarily designed for the threat situation of the Cold War , when development began. It should be able to follow motorized formations, get into position quickly and, after completing the order to fire, quickly change position to avoid enemy return fire. This so-called shoot-and-scoot” ability (German: 'Fire and cut off') ensures that your own firing positions are almost impossible to effectively fight with return fire. The self-propelled howitzer should be able to follow the highly mobile armored formations in order to be ready at all times for fire support against soft to hard targets. Their armor should enable firefighting even under enemy fire. The fire control and positioning equipment allows the individual vehicles a high degree of autonomy. In principle, firing positions are no longer necessary, you can shoot from any position. [17] Support from a fire control center is also no longer required. The mission profile provides that a train in a camouflaged position (the so-called covered deployment) waiting for a fire command. If such a message arrives via data radio, the guns move out of the covered position, carry out the fire command and move into a new covered position. The period from receiving the fire command to leaving the position takes a maximum of two minutes. [18]
Shoot-and-Scoot you may have heard before. We used the term PURUFO - "Pack-Up-Rev-Up-Fuck-Off". This is what the fighting will be like in the Donbas, for both sides. Get a round or two away, drop and go. Modern systems are bristling and will detect and start analysing incoming missions immediately.