User manual YASKAWA VS MINI J7

[. . . ] VS mini J7 Series Instruction Manual COMPACT GENERAL-PURPOSE INVERTER (VOLTAGE VECTOR CONTROL) PREFACE YASKAWA's VS mini J7 is a compact and simple inverter that is as easy to use as a contactor. This instruction manual describes installation, maintenance, inspection, troubleshooting, and specifications of the VS mini J7. Read this instruction manual thoroughly before operation. YASKAWA ELECTRIC CORPORATION General Precautions · Some drawings in this manual are shown with the protective covers and shields removed, in order to illustrate detail with more clarity. Make sure all covers and shields are replaced before operating this product. [. . . ] To select RUN/STOP commands or frequency reference, change the mode in advance depending on the following applications. · LOCAL Mode: Enables the digital operator for RUN/STOP commands and FWD/REV run commands. Frequency reference can be set by volume or . · REMOTE Mode: Run by the n02 setting (operation reference selection). Frequency reference can be set by n03 (frequency reference selection) setting. · How to select LOCAL/REMOTE modes (When 17 is not set to any parameters n36 to n39) (When 17 is set to any parameters n36 to n39) 61 · Selecting Run/Stop Commands Refer to page 63 to select either the LOCAL mode or REMOTE mode. Operation method (RUN / STOP commands, FWD / REV run commands) can be selected by the following method. · LOCAL Mode When Lo (local mode) is displayed on the digital operator (when is illuminated), or when the LOCAL / REMOTE changeover function is set as a multi-function input and the input terminal is turned ON, run operation is enabled by the illuminating or of the digital operator. FWD/REV is selected by and using or key to select FWD or REV. · REMOTE mode · Select remote mode The following two methods are used to select remote mode: 1. Select rE (remote mode) for selection. 2. When the local / remote switching function is selected as multi-function input selection, turn OFF the input terminal to select remote mode. · Select operation method by setting the parameter n02. n02=0: Enables the digital operator (same with local mode) =1: Enables the multi-function input terminal (see fig. below) =2: Enables communications (refer to page 96) · Example for using the multi-function input terminal as operation reference (two-wire sequence) follows. For 3-wire sequencing, refer to page 85. · Operating (RUN /STOP commands) by communications (When option card is installed) Setting parameter n02 to 2 in REMOTE mode can give RUN / STOP commands by communication (MEMOBUS). For details, refer to page 96. 62 · Selecting Frequency Reference Frequency reference can be selected by the following methods. · Setting by operator Select REMOTE or LOCAL mode in advance. For the method of selecting the mode, refer to page 62. LOCAL mode Parameter n07 determines where the frequency reference is input from when in the local mode. n07 =0: Enables the setting by volume on digital operator (initial setting) Factory setting of the model with operator (without volume) is n07=1. =1: Enables the digital setting by digital operator, setting value is stored in parameter n21 (frequency reference 1). · Digital setting by digital operator Input frequency while FREF is illuminated (press ENTER after setting the desired frequency value). Frequency reference setting is immediately effective when n08 = 1 The ENTER key does not have to be pressed to enter the reference. n08 =0: Enables frequency reference acceptance by ENTER key. =1: Disable frequency reference setting by ENTER key. It is not necessary to press the ENTER key to accept the reference. REMOTE mode Parameter n03 determines where the frequency reference is accepted from when in the REMOTE mode. [. . . ] Operation In some systems it may be necessary to install additional monitoring and protective facilities to comply with the applicable safety and accident prevention regulations. The only changes permitted are to the operator software of the inverters. Please note that the capacitors can remain charged for up to around 5 minutes after the frequency converter has been disconnected from the power supply. You should thus always wait for a short period before opening the unit and touching the electrical connections. [. . . ]