
3/3
Notice of the update of Digital
Servo Software 90A5 series
Attached 1. Running time shortening function
(1) Overview
Servo software 90A5 series, which is applicable to the Dual Check Safety function, needs
more running time than servo software 90A0 series because the programs for the Dual
Check Safety function are executed in addition to normal servo programs. And a closed
loop system needs more running time than a semi-closed loop system.
So, when a separate position detector and HRV2 control are used at the same time in the
servo software 90A5 series, there is a possibility that servo software detects “System alarm
920 or 921 (FS16i, 18i, 21i)” as a result of lacking of running time. And so the function
which can shorten running time has been added.
(2) Series and editions of applicable servo software
Series 90A5/C (03) or later (FS16i, 18i, 21i)
(3) Setting parameters
Please set the following function bit to 1 for all axes in case your system meets the
following conditions.
• A separate position detector and HRV2 control are used at the same time.
#7 #6 #5 #4 #3 #2 #1 #0
2222
RUNTIM
2610
RUNTIM (#7) Running time shortening function is
0: invalid.
1: valid.
(4) Note
If the function bit mentioned above is set to 1 in servo software 90A5/A (01) and 90A5/B
(02), alarms may occur because some programs which are relevant to the Dual Check
Safety function cannot be executed.
So servo software 90A5/C (03) or later must be used and sets the function bit mentioned
above when HRV2 control is used on the axis with a separate position detector.