Check Out, Configuration and Calibration
Operational Checkout
23
Pushbutton Locks and Configuration-Lock Jumper
Before performing any of these functions with the local display you must
first ensure that the pushbuttons are placed in the unlocked mode using
ValVue 2.4 Lite. The positioner is provided in the unlocked mode. See
ValVue 2.4 documentation for more details.
The SVI II AP offers several levels of accessibility. It may be desirable,
after initial setup, to lock the pushbuttons so that the SVI II AP
parameters cannot be inadvertently changed by the buttons. Several
levels of pushbutton locks are provided.
Table 6 Pushbutton Lock Security Level
Level
Access
Security Level 3
Allow Local Buttons: Buttons on the SVI II AP are fully enabled.
Security Level 2
Lock Out Local Calibration and Configuration: Use the buttons to perform op-
erations in normal operating mode and manual mode. Do not go to configure
or calibrate mode.
Security Level 1
Lock Out Local Manual: Examine variables in normal operating mode but do
not put the valve in manual operating mode. Access to calibrate or configure
modes is not available.
Security Level 0
Lock Out All Buttons: The buttons are disabled (level 0).
Hardware Configuration Lock
Additional security is achieved using the hardware configuration-lock
jumper shown in Figure 11 on page 21. When set to the secure
position, shorting the two-pin header, configuration and calibration are
not permitted by the local interface or by remote communications.
Pushbuttons, ValVue 2.4 and HHC 375 are locked out, except to
examine configuration, calibration, and position. This is similar to
Security Level 1 shown in the Pushbutton Lock Security Level table.
Powering Up the SVI II AP
This process can cause the valve to move. Before proceeding be sure
the valve is isolated from the process. Keep hands clear from moving
parts.
Note:
When an SVI II AP is turned on it is advisable to apply the air
supply before applying the electrical input signal.
Use of a low impedance voltage source will damage the SVI II AP. The
current source must be a true high impedance current limiting device.
A proper current source explicitly enables adjustment of the current in
mA, not Volts.
Summary of Contents for Masoneilan SVI II AP-2
Page 1: ......
Page 8: ...Masoneilan Dresser SVI II AP Quick Start Guide vi ...
