ABB GDB021BE05 HIEE300766R0005端子模块
即使接入终端没有短路，用于存储新设定点的串行端口命令也会运行。当接入终端打开时，仍然可以访问所有实际值和设定值以进行查看；然而，如果试图存储新的设定点值，则显示消息setpoint ACCESS DISABLED（设定点访问禁用），并且先前的设定点保持不变。这样，所有编程设定点都保持安全和防篡改。•选择模拟输出：此开关选择允许将每个模拟输出多路复用为两个输出。如果开关激活，设置点S2 SYSTEM SETUP\ANALOG OUTPUT 1\ANALOG OUTPUT 1 ALT中分配的参数决定输出电平。如果开关未激活，则使用设置点S2 SYSTEM SETUP\ANALOG OUTPUT 1\ANALOG OUTPUT 1 MAIN中指定的参数。更多详细信息，请参见下文第2.2.7节：模拟输出（可选）和第24页第4.3.2节：模拟输入。
Serial port commands to store new setpoints operate even if the access terminals are not shorted. When the access terminals are open, all actual and setpoint values can still be accessed for viewing; however, if an attempt is made to store a new setpoint value, the message SETPOINT ACCESS DISABLED is displayed and the previous setpoint remains intact. In this way, all of the programmed setpoints remain secure and tamper proof. • SELECT ANALOG OUTPUT: This switch selection allows each analog output to be multiplexed into two outputs. If the switch is active, the parameter assigned in setpoint S2 SYSTEM SETUP \ ANALOG OUTPUT 1 \ ANALOG OUTPUT 1 ALT determines the output level. If the switch is not active, the parameter assigned in setpoint S2 SYSTEM SETUP \ ANALOG OUTPUT 1 \ ANALOG OUTPUT 1 MAIN is used. See Sections 2.2.7: Analog Outputs (Optional) below and 4.3.2: Analog Outputs on page –24 for additional details.
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