Alarm logging

Dear Experts,

For alarm logging and trends i need clarification of Limitations of range as following

1.How many alarms can be logged in Alarm buffer (please dont explain only in terms of memory) 

2.If alarm buffer size is vary for each HMI means where shall i found whether it is in any documents or it is in hardware set up?

3.How many trends can be log without memory card and with memory card (please dont explain only in terms of memory) if the following is true then it will suitable for all HMI's ?

There is the buffer size maximum 999 Values. The time span depends on the setting you set at "Source setting" -> "cyclic" of the trend.

for example if you use 1s then every second there will be saved a Value in the buffer and if you use 999 Values the time amount will be only 999s.

But if you use 10s as setting for example the Buffer´s time amount is 9990s.

Thanks in advance.