590C/0350/5/3/2/1/0/00/000 H2R40E5 模拟量控制器 Eurotherm
从主CPU到备份CPU。这应当谨慎地进行，
以及考虑对该过程可能产生的影响。
决不能从主处理器单元上拆下RCU链路电缆
在冗余操作期间。移除电缆可能会导致装置停止。
冗余CPU4节操作验证
198 3BSE036351-600 A
3BSE036351-600 A 199
5节维护
本节介绍了以下方面的预防性和纠正性维护措施：
AC 800M控制器以及两个系统的故障排除程序
以及单个单元。
预防性维护频率表
在尝试维护或故障排除之前，请阅读
13页。否则可能导致人身伤害或设备损坏。
表24.预防性维护频率表
频率设备程序
以用户定义的定期间隔
完成系统：对所有系统进行目视检查
硬件、连接器和接线。检查
这个：
•物理损坏和退化
•安全连接
•连接器和接线的状况
•LED功能
纠正任何缺陷。
2年PM8xx
内部电池
（如已安装）
更换电池
参见200页的“内部电池”
更换蓄电池5节维护
200 3BSE036351-600 A
更换电池
内部电池
内部电池安装在PM8xx处理器单元内部（PM891除外）。
由于电池不可充电，因此定期更换电池非常重要
（有关更多详细信息，请参阅维护频率表）。详情
纠正蓄电池极性，从蓄电池壳体上拆下右侧盖
（参见201页图68和202页图69）。
内部电池规格：
•类型：低速率锂电池，3.6V，950毫安时。
•尺寸：ANSI尺寸½AA/IEC尺寸½R6
•锂含量：0.3克
5年SB821
外部电池
（如已安装）
更换电池
请参见页的SB821外部电池单元
203
3年或400年
放电循环
SB822
可充电
外部电池
（如已安装）
更换电池
参见SB822可充电外部电池
205页单元
本主题不适用于不包含内部电池的PM891。
由于电池并联连接，在使用
SB821外部电池，从PM8xx中卸下内部电池，以便
避免减少可用内存和备份时间。
可以使用AC 800M控制器在线更换内部电池。
但是，务必始终遵守标准安全工作规程。
表24预防性维护频率表（续）
频率设备程序
5节内部电池的维护
3BSE036351-600 A 201
在以下情况下，必须更换电池：
•PM8xx B（电池）LED闪烁或熄灭。
•发生多次或长时间停电。
•因维护而延长了系统停机时间，或
故障。
出于安全考虑，仅在AC 800M通电时更换电池
590C/0350/5/3/2/1/0/00/000 H2R40E5 模拟量控制器 Eurotherm
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from the Primary CPU to the Backup CPU. This should be performed with caution,
and consideration to possible impact on the process.
The RCU Link Cable must NEVER be removed from the primary Processor Unit
during redundant operation. Removal of the cable may cause the unit to stop.
Verification of Redundant CPU Section 4 Operation
198 3BSE036351-600 A
3BSE036351-600 A 199
Section 5 Maintenance
This section describes preventive and corrective maintenance measures for the
AC 800M Controller together with troubleshooting procedures for both the system
and individual units.
Preventive Maintenance Frequency Schedule
Before attempting maintenance or troubleshooting, read the Safety Summary on
page 13. Failure to do so could lead to personal injury or damage to equipment.
Table 24. Preventive Maintenance Frequency Schedule
Frequency Equipment Procedure
At regular, userdefined intervals
Complete system Carry out a visual inspection of all system
hardware, connectors and wiring. Check for
the:
• Physical damage and deterioration
• Secure attachment
• Condition of connectors and wiring
• LED function
Correct any defects.
2 Years PM8xx
Internal Battery
(if fitted)
Change battery
See Internal Battery on page 200
Replacing the Battery Section 5 Maintenance
200 3BSE036351-600 A
Replacing the Battery
Internal Battery
The internal battery is mounted inside the PM8xx processor unit (except PM891).
Since the battery is not rechargeable, it is important to exchange it on a regular basis
(refer to the Maintenance Frequency Schedule for further details). For details of
correct battery polarity, remove the right-hand cover from the battery housing
(see Figure 68 on page 201 and Figure 69 on page 202).
Specifications for the internal battery:
• Type: Low-rate lithium battery, 3.6 V, 950 mAh.
• Size: ANSI Size ½ AA / IEC size ½ R6
• Lithium contents: 0.3 g
5 Years SB821
External Battery
(if fitted)
Change battery
See SB821 External Battery Unit on page
203
3 years or 400
discharge cycles
SB822
Rechargeable
External Battery
(if fitted)
Change battery
See SB822 Rechargeable External Battery
Unit on page 205
This topic does not apply to PM891, which does not contain internal battery.
Due to the batteries being connected in parallel, it is necessary, when using the
SB821 external battery, to remove the internal battery from the PM8xx in order to
avoid reducing available memory back-up time.
It is possible to replace the internal battery with the AC 800M Controller online.
However, be sure to observe standard safe working practices at all times.
Table 24. Preventive Maintenance Frequency Schedule (Continued)
Frequency Equipment Procedure
Section 5 Maintenance Internal Battery
3BSE036351-600 A 201
The battery must be exchanged whenever:
• The PM8xx B(attery) LED flashes or is extinguished.
• Multiple or extended power cuts have occurred.
• Extended periods of system downtime have occurred for maintenance or
malfunctions.
For reasons of safety, exchange the battery only when the AC 800M is powered up 590C/0350/5/3/2/1/0/00/000 H2R40E5 模拟量控制器 Eurotherm
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