3BHE014105R0001模块IGCT,3BHE014105R0001使用区域
使用机架中的多个模块升级固件当安装多个IO模块时，使用WinLoader实用程序升级PLC固件的过程可能会失败在主机架、远程机架或扩展机架中，由于重新启动PLC CPU需要额外的时间。如果升级进程失败，等待电源上的OK LED停止闪烁，然后单击Winloader固件更新失败对话框。如果升级再次失败，请将PLC CPU移到机架上没有IO模块，重新启动升级过程。
3BHE014105R0001模块IGCTPID积分贡献积分率为0或1时，无法正确计算PID积分贡献。以太网操作说明IP地址类的子网掩码值必须正确CPU374接受IP地址和子网掩码的一些无效组合。例如虽然IP地址=129.0.0.1和子网掩码=255.254.0.0的组合无效，但可以接受。本例为B类IP地址，由其两个最高有效位定义。接下来的14个最多有效位定义网络号或网络ID。为了有效，子网掩码必须包含位中的子网掩码IP地址的类和netid字段的位置。当通过硬件配置或工作站存储此类无效组合时管理“chsosw”命令时，CPU374将假设某些IP地址可以在本地计算机上访问当它们不是时，则为子网。在上例中，地址在129.1.0.1到129.1.255.255之间受到影响。此问题会阻止以太网与受影响的IP地址通信，直到子网修正掩模。下表指定了每个地址类的最小子网掩码。
Upgrading Firmware with Many Modules in Rack
The process of upgrading the PLC firmware with the WinLoader utility may fail when multiple IO modules are
in the main, remote or expansion racks, due to the extra time it takes to restart the PLC CPU. If the upgrade
process fails, wait until the OK LED on the power supply stops blinking and then click the Retry button on the
Winloader Firmware Update Failed dialog box. If the upgrade fails again, move the PLC CPU to a rack
without IO modules and restart the upgrade process.
PID Integral Contribution
The PID Integral Contribution is not calculated correctly with an integral rate of zero or one.Ethernet Operational Notes
Subnet Mask Value Must Be Correct For IP Address Class
The CPU374 accepts some invalid combinations of IP address and subnet mask. For example, the
combination of IP address = 129.0.0.1 and subnet mask = 255.254.0.0 is accepted although it is invalid.
This example is a Class B IP address, as defined by its two most significant bits. The next 14 most
significant bits define the network number or netid. To be valid, the subnet mask must contain ones in the bit
positions of the IP address’s class and netid fields.
When an invalid combination of this kind is stored through either the hardware configuration or station
manage “chsosw” command, the CPU374 will assume that certain IP addresses are reachable on the local
subnet when they are not. In the example above, addresses in the range 129.1.0.1 through 129.1.255.255
are affected. This issue prevents Ethernet communications with the affected IP addresses until the subnet
mask is corrected.
The following table specifies minimum subnet masks for each address class.
