Ulvac UTM300B, Instruction Manual

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SECTION 6 OPERATION
6.5.3 Operation From Rated Speed Rotation to Low Speed Rotation
The following procedure is used to change the rotation speed setting and operate in the low-
speed mode when currently operating at the rated speed or accelerating at a speed greater than
low speed rotation.
6.5.3.1 Remote Control Startup Procedure
(1) Set rotation to low speed via RS-485 interface.
(2) Input a low-speed signal via the logic interface (Refer to Table 6-6).
(3) This switches the "NORMAL" signal OFF (Refer to Table 6-6) and starts coasting the
pump.
(4) Once rotation reaches the low-speed rotation speed, the "NORMAL" signal ON.
(5) The pump stops coasting and maintains it current rotation speed.
※
If the "LOW SPEED" signal is canceled before reaching low-speed rotation, then it will
function the same as for normal startup mode.
6.5.3.2 RS-485 interface Operation
(1) Set rotation to low speed via RS-485 communication.
(2) "LOW SPEED" command is input via RS-485 communication.
(3) Status is changed from "NORMAL" to "IDLE", and starts coasting the pump.
(4) Once rotation reaches the low speed rotation speed, status is changed from "IDLE" to
"NORMAL". The pump stops coasting and maintains it current rotation speed.