Specifications

Chapter 6: Programming Features
Firmware – S2011 and S3012
Revision: 1 (9/98) 53 © Saftronics, Inc.
The following shows the time chart at UP/DOWN command input.
Figure 45 Timing Diagram of VP/Down Command Input
U = UP (accelerating) status
D = DOWN (decelerating) status
H = HOLD (constant Speed) status
U1 = UP status, clamping at upper limit speed
D1 = DOWN status, clamping at lower limit speed
NOTE: 1. When UP/DOWN command is selected, the upper limit speed is set regardless of frequency reference.
Upper limit speed = Maximum output frequency (n012) 5 Frequency reference upper limit (n030)/100
2. Lower limit value is either frequency by Analog command from control circuit Terminals, FV, FI or frequency reference lower
limit (n031) (whichever is larger).
3. When the FWD or REV RUN command is input, operation starts at the lower limit speed without an UP/DOWN command.
4. If the jog frequency selection command is input while running by the UP/DOWN command, the jog command has priority.
§ Loop Test (Setting: 26)
Checks operation in the serial I/F circuit. If a fault occurs, the Digital Operator displays CE.
Procedure
1. Set the multi-function contact input selection (n039) after turning ON the Inverter power supply, and then turn
OFF the Inverter power supply.
2. Short-circuit Terminals S6 and SC, connector 2CN pins 1 and 2. (Do not short-circuit when connecting
communication interface card SI-K2/P.)
3. Loop test is started by turning ON the Inverter power supply.
The Digital Operator displays the frequency reference after the loop test is completed satisfactorily.
6.5.2. Using Analog Input Signals (n042 to n045)
§ Master Analog Input Selection (n042)
To input the master frequency reference from the control circuit terminal, select voltage reference Terminal FV or
current reference Terminal FI by setting constant n042.
Setting
Master Frequency
Reference Terminal
Input Level
0 FV 0 to 10 V input
1 FI 4 to 20 mA input
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