ABB power module DSSR122M 48990001-LR rack power supply DSSR 122 M

Description

• After installing the setpoint access jumper, a passcode must be entered (if the passcode

  security feature is enabled) before setpoints can be changed. When the 745 is shipped

  from the factory, the passcode is defaulted to 0. When the passcode is 0, the passcode

  security feature is disabled and only the setpoint access jumper is required for changing

  setpoints from the front panel. Passcode entry is also required when programming

  setpoints from any of the serial communication ports.

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  SETPOINT ACCESS: This setpoint cannot be edited directly. It indicates if passcode

  protection is enabled (“Read Only”) or disabled (“Read & Write”).

  RESTRICT SETPOINT WRITE ACCESS: This setpoint is only displayed when setpoint

  write access is allowed and the current passcode is not “0”. Select “Yes” and follow

  directions to restrict write access. This message is replaced by ALLOW SETPOINT

  WRITE ACCESS when write access is restricted.

  ALLOW SETPOINT WRITE ACCESS: This setpoint is displayed when setpoint write

  access is restricted. New setpoints cannot be entered in this state. To gain write

  access, select “Yes” and enter the previously programmed passcode. If the passcode

  is correctly entered, new setpoint entry is allowed. If there is no keypress within 30

  minutes, setpoint write access is automatically restricted. As an additional safety

  measure, the SELF-TEST ERROR: Access Denied message is generated when the

  passcode is entered incorrectly three consecutive times.

  CHANGE PASSCODE: Select “Yes” and follow directions to change the current

  passcode. Changing the passcode to the factory default of “0” disables the passcode

  security feature.

  ENCRYPTED PASSCODE: If the programmed passcode is unknown, consult the factory

  service department with the encrypted passcode. The passcode can be determined

  using a deciphering program.

• Some relay characteristics can be modified to accommodate the user preferences. This

  section allows for the definition of such characteristics.

  FLASH MESSAGE TIME: Flash messages are status, warning, error, or information

  messages displayed for several seconds, in response to certain key presses during

  setpoint programming. The time these messages remain on the display, overriding the

  normal messages, can be changed to accommodate different user reading rates.

  DEFAULT MESSAGE TIMEOUT: After this period of time of no activity on the keys, the

  745 automatically begins to display the programmed set of default messages

  programmed in S1 745 SETUP  DEFAULT MESSAGES.

• Up to 32 relays can be daisy-chained and connected to a computer or a programmable

  controller, using either the two-wire RS485 or the four-wire RS422 serial communication

  port at the rear of the 745. Before using communications, each relay must be programmed

  with a unique address and a common baud rate.

  SLAVE ADDRESS: Enter a unique address, from 1 to 254, for this particular relay on

  both COM1 and COM2 serial communication links. Although addresses need not be

  sequential, no two relays can have the same address. Generally each relay added to

  the link will use the next higher address, starting from address 1. No address is

  required to use the front panel program port since only one relay can be connected at

  one time.

  COM1/COM2 BAUD RATE: Select the baud rates for COM1, the RS485/RS422

  communication port, or COM2. All relays on the communication link, and the

  computer connecting them, must run at the same baud rate. The fastest response is

  obtained at 19200 baud.

  COM1/COM2 PARITY: The data frame is fixed at 1 start, 8 data, and 1 stop bit. If

  required, a parity bit is programmable. The parity of the transmitted signal must

  match the parity displayed in this setpoint.

  COM1 HARDWARE: If the two-wire RS485 hardware configuration is required for the

  COM1 serial communication port, select RS485. If the four wire RS422 hardware

  configuration is required, select RS422.

  FRONT BAUD RATE / FRONT PARITY: Select the baud rate / parity for the front panel

  port.

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